This character is a Decimal Number and is mainly used in the Myanmar script. The codepoint has the decimal value 9.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it is written from left to right. When changing direction it is not mirrored. This number joins with other adjacent letters and numbers to form a word. U+1099 forms a number with similar characters, which prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
9 (nine) is the natural number following 8 and preceding 10.
Representations
System
Representation (click value to copy)
Nº
4249
UTF-8
E1 82 99
UTF-16
10 99
UTF-32
00 00 10 99
URL-Quoted
%E1%82%99
HTML hex reference
႙
Wrong windows-1252 Mojibake
á‚™
Encoding: GB18030 (hex bytes)
81 33 93 33
RFC 5137
\u'1099'
Bash and Zsh inside echo -e
\u1099
C and C++
\u1099
C#
\u1099
CSS
\001099
Excel
=UNICHAR(4249)
Go
\u1099
JavaScript
\u1099
Modern JavaScript since ES6
\u{1099}
JSON
\u1099
Java
\u1099
Lua
\u{1099}
Matlab
char(4249)
Perl
"\x{1099}"
PHP
\u{1099}
PostgreSQL
U&'\1099'
PowerShell
`u{1099}
Python
\u1099
Ruby
\u{1099}
Rust
\u{1099}
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