Glyph for U+221B
Source: Noto Sans Math
U+221B Cube Root
U+221B was added in Unicode version 1.1 in 1993. It belongs to the block U+2200 to U+22FF Mathematical Operators in the U+0000 to U+FFFF Basic Multilingual Plane .

This character is a Math Symbol and is commonly used, that is, in no specific script.

The glyph is not a composition . It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral . When changing direction it is mirrored . The word that U+221B forms with similar adjacent characters prevents a line break inside it.

The Wikipedia has the following information about this codepoint:

In mathematics, the radical symbol , radical sign , root symbol , radix , or surd is a symbol for the square root or higher-order root of a number. The square root of a number x is written as

$\sqrt{x},$ while the n th root of x is written as

$\sqrt[n]{x}.$ It is also used for other meanings in more advanced mathematics, such as the radical of an ideal.

In linguistics, the symbol is used to denote a root word.

Representations
System
Representation
Nº
8731
UTF-8
E2 88 9B
UTF-16
22 1B
UTF-32
00 00 22 1B
URL-Quoted
%E2%88%9B
HTML hex reference
∛
Wrong windows-1252 Mojibake
âˆ›

Complete Record
Property
Value
Age (age)
1.1 (1993)
Unicode Name (na)
CUBE ROOT
Unicode 1 Name (na1)
—
Block (blk)
Mathematical Operators
General Category (gc)
Math Symbol
Script (sc)
Common
Bidirectional Category (bc)
Other Neutral
Combining Class (ccc)
Not Reordered
Decomposition Type (dt)
none
Decomposition Mapping (dm)
Glyph for U+221B Cube Root
Lowercase (Lower)
✘
Simple Lowercase Mapping (slc)
Glyph for U+221B Cube Root
Lowercase Mapping (lc)
Glyph for U+221B Cube Root
Uppercase (Upper)
✘
Simple Uppercase Mapping (suc)
Glyph for U+221B Cube Root
Uppercase Mapping (uc)
Glyph for U+221B Cube Root
Simple Titlecase Mapping (stc)
Glyph for U+221B Cube Root
Titlecase Mapping (tc)
Glyph for U+221B Cube Root
Case Folding (cf)
Glyph for U+221B Cube Root
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)
Glyph for U+221B Cube Root
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)
✘
Math (Math)
✔
Noncharacter Code Point (NChar)
✘
NFC Quick Check (NFC_QC)
Yes
NFD Quick Check (NFD_QC)
Yes
NFKC Casefold (NFKC_CF)
Glyph for U+221B Cube Root
NFKC Quick Check (NFKC_QC)
Yes
NFKC_SCF (NFKC_SCF)
Glyph for U+221B Cube Root
NFKD Quick Check (NFKD_QC)
Yes
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)
Other
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)
Glyph for U+221B Cube Root
Bidi Paired Bracket Type (bpt)
None
East Asian Width (ea)
neutral
Hangul Syllable Type (hst)
Not Applicable
ISO 10646 Comment (isc)
—
Joining Group (jg)
No_Joining_Group
Joining Type (jt)
Non Joining
Line Break (lb)
Alphabetic
Numeric Type (nt)
none
Numeric Value (nv)
not a number
Simple Case Folding (scf)
Glyph for U+221B Cube Root
Script Extension (scx)
Vertical Orientation (vo)
R