Source: Noto CJK

U+3321 Square Siringu

U+3321 was added in Unicode version 1.1 in 1993. It belongs to the block U+3300 to U+33FF CJK Compatibility in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Symbol and is mainly used in the Katakana script.

The glyph is a square composition of the glyphs Katakana Letter Si, Katakana Letter Ri, Katakana Letter N, Katakana Letter Gu. Its East Asian Width is wide. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This katakana joins with other adjacent katakana to form a word. U+3321 offers a line break opportunity at its position, except in some numeric contexts.

The Wikipedia has the following information about this codepoint:

The shilling is a historical coin, and the name of a unit of modern currencies formerly used in the United Kingdom, Australia, New Zealand, other British Commonwealth countries and Ireland, where they were generally equivalent to 12 pence or one-twentieth of a pound before being phased out during the 1960s and 1970s.
Currently the shilling is used as a currency in five east African countries: Kenya, Tanzania, Uganda, Somalia, and the de facto country of Somaliland. The East African Community additionally plans to introduce an East African shilling.

Representations

System	Representation (click value to copy)
Nº	13089
UTF-8	E3 8C A1
UTF-16	33 21
UTF-32	00 00 33 21
URL-Quoted	%E3%8C%A1
HTML hex reference	㌡
Wrong windows-1252 Mojibake	ãŒ¡
Encoding: GB18030 (hex bytes)	81 39 D9 37
RFC 5137	\u'3321'
Bash and Zsh inside `echo -e`	\u3321
C and C++	\u3321
C#	\u3321
CSS	\003321
Excel	=UNICHAR(13089)
Go	\u3321
JavaScript	\u3321
Modern JavaScript since ES6	\u{3321}
JSON	\u3321
Java	\u3321
Lua	\u{3321}
Matlab	char(13089)
Perl	"\x{3321}"
PHP	\u{3321}
PostgreSQL	U&'\3321'
PowerShell	`u{3321}
Python	\u3321
Ruby	\u{3321}
Rust	\u{3321}
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Elsewhere

Complete Record

Property	Value
Age (age)	1.1 (1993)
Unicode Name (na)	SQUARE SIRINGU
Unicode 1 Name (na1)	SQUARED SIRINGU
Block (blk)	CJK Compatibility
General Category (gc)	Other Symbol
Script (sc)	Katakana
Bidirectional Category (bc)	Left To Right
Combining Class (ccc)	Not Reordered
Decomposition Type (dt)	square
Decomposition Mapping (dm)	Katakana Letter Si Katakana Letter Ri Katakana Letter N Katakana Letter Gu
Lowercase (Lower)	✘
Simple Lowercase Mapping (slc)	Square Siringu
Lowercase Mapping (lc)	Square Siringu
Uppercase (Upper)	✘
Simple Uppercase Mapping (suc)	Square Siringu
Uppercase Mapping (uc)	Square Siringu
Simple Titlecase Mapping (stc)	Square Siringu
Titlecase Mapping (tc)	Square Siringu
Case Folding (cf)	Square Siringu
ASCII Hex Digit (AHex)	✘
Alphabetic (Alpha)	✘
Bidi Control (Bidi_C)	✘
Bidi Mirrored (Bidi_M)	✘
Composition Exclusion (CE)	✘
Case Ignorable (CI)	✘
Changes When Casefolded (CWCF)	✘
Changes When Casemapped (CWCM)	✘
Changes When NFKC Casefolded (CWKCF)	✔
Changes When Lowercased (CWL)	✘
Changes When Titlecased (CWT)	✘
Changes When Uppercased (CWU)	✘
Cased (Cased)	✘
Full Composition Exclusion (Comp_Ex)	✘
Default Ignorable Code Point (DI)	✘
Dash (Dash)	✘
Deprecated (Dep)	✘
Diacritic (Dia)	✘
Emoji Modifier Base (EBase)	✘
Emoji Component (EComp)	✘
Emoji Modifier (EMod)	✘
Emoji Presentation (EPres)	✘
Emoji (Emoji)	✘
Extender (Ext)	✘
Extended Pictographic (ExtPict)	✘
FC NFKC Closure (FC_NFKC)	Square Siringu
Grapheme Cluster Break (GCB)	Any
Grapheme Base (Gr_Base)	✔
Grapheme Extend (Gr_Ext)	✘
Grapheme Link (Gr_Link)	✘
Hex Digit (Hex)	✘
Hyphen (Hyphen)	✘
ID Continue (IDC)	✘
ID Start (IDS)	✘
IDS Binary Operator (IDSB)	✘
IDS Trinary Operator and (IDST)	✘
IDSU (IDSU)	0
ID_Compat_Math_Continue (ID_Compat_Math_Continue)	0
ID_Compat_Math_Start (ID_Compat_Math_Start)	0
Ideographic (Ideo)	✘
InCB (InCB)	None
Indic Mantra Category (InMC)	—
Indic Positional Category (InPC)	NA
Indic Syllabic Category (InSC)	Other
Jamo Short Name (JSN)	—
Join Control (Join_C)	✘
Logical Order Exception (LOE)	✘
Modifier Combining Mark (MCM)	✘
Math (Math)	✘
Noncharacter Code Point (NChar)	✘
NFC Quick Check (NFC_QC)	Yes
NFD Quick Check (NFD_QC)	Yes
NFKC Casefold (NFKC_CF)	Katakana Letter Si Katakana Letter Ri Katakana Letter N Katakana Letter Gu
NFKC Quick Check (NFKC_QC)	No
NFKC_SCF (NFKC_SCF)	Katakana Letter Si Katakana Letter Ri Katakana Letter N Katakana Letter Gu
NFKD Quick Check (NFKD_QC)	No
Other Alphabetic (OAlpha)	✘
Other Default Ignorable Code Point (ODI)	✘
Other Grapheme Extend (OGr_Ext)	✘
Other ID Continue (OIDC)	✘
Other ID Start (OIDS)	✘
Other Lowercase (OLower)	✘
Other Math (OMath)	✘
Other Uppercase (OUpper)	✘
Prepended Concatenation Mark (PCM)	✘
Pattern Syntax (Pat_Syn)	✘
Pattern White Space (Pat_WS)	✘
Quotation Mark (QMark)	✘
Regional Indicator (RI)	✘
Radical (Radical)	✘
Sentence Break (SB)	Other
Soft Dotted (SD)	✘
Sentence Terminal (STerm)	✘
Terminal Punctuation (Term)	✘
Unified Ideograph (UIdeo)	✘
Variation Selector (VS)	✘
Word Break (WB)	Katakana
White Space (WSpace)	✘
XID Continue (XIDC)	✘
XID Start (XIDS)	✘
Expands On NFC (XO_NFC)	✘
Expands On NFD (XO_NFD)	✘
Expands On NFKC (XO_NFKC)	✔
Expands On NFKD (XO_NFKD)	✔
Bidi Paired Bracket (bpb)	Square Siringu
Bidi Paired Bracket Type (bpt)	None
East Asian Width (ea)	wide
Hangul Syllable Type (hst)	Not Applicable
ISO 10646 Comment (isc)	—
Joining Group (jg)	No_Joining_Group
Joining Type (jt)	Non Joining
Line Break (lb)	Ideographic
Numeric Type (nt)	none
Numeric Value (nv)	not a number
Simple Case Folding (scf)	Square Siringu
Script Extension (scx)
Vertical Orientation (vo)	Tu