This character is a Other Number and is commonly used, that is, in no specific script. The codepoint has the numeric value 10.
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. The word that U+1D2CA forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The Kaktovik numerals or Kaktovik Iñupiaq numerals are a base-20 system of numerical digits created by Alaskan Iñupiat. They are visually iconic, with shapes that indicate the number being represented.
The Iñupiaq language has a base-20 numeral system, as do the other Eskimo–Aleut languages of Alaska and Canada (and formerly Greenland). Arabic numerals, which were designed for a base-10 system, are inadequate for Iñupiaq and other Inuit languages. To remedy this problem, students in Kaktovik, Alaska, invented a base-20 numeral notation in 1994, which has spread among the Alaskan Iñupiat and has been considered for use in Canada.
Representations
System
Representation (click value to copy)
Nº
119498
UTF-8
F0 9D 8B 8A
UTF-16
D8 34 DE CA
UTF-32
00 01 D2 CA
URL-Quoted
%F0%9D%8B%8A
HTML hex reference
𝋊
Wrong windows-1252 Mojibake
ð‹Š
Encoding: GB18030 (hex bytes)
94 32 E9 32
RFC 5137
\u'1D2CA'
Bash and Zsh inside echo -e
\U0001D2CA
C and C++
\U0001D2CA
C#
\U0001D2CA
CSS
\01D2CA
Excel
=UNICHAR(119498)
Go
\U0001D2CA
JavaScript
\uD834\uDECA
Modern JavaScript since ES6
\u{1d2ca}
JSON
\uD834\uDECA
Java
\uD834\uDECA
Lua
\u{1D2CA}
Matlab
char(119498)
Perl
"\x{1D2CA}"
PHP
\u{1d2ca}
PostgreSQL
U&'\+01D2CA'
PowerShell
`u{1D2CA}
Python
\U0001D2CA
Ruby
\u{1d2ca}
Rust
\u{1d2ca}
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