This character is a Other 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 is written from left to right. When changing direction it is not mirrored. The word that U+1D131 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In music, sharp β eqv. diΓ¨se (from French) or diesis (from Greek δίΡΟΞΉΟ) β means higher in pitch. The sharp symbol, β―, indicates that the note to which the symbol is applied is played one semitone higher. The opposite of sharp is flat, indicating a lowering of pitch. The β― symbol derives from a square form of the letter b (see History of notation of accidentals for more information).
Representations
System
Representation (click value to copy)
NΒΊ
119089
UTF-8
F0 9D 84 B1
UTF-16
D8 34 DD 31
UTF-32
00 01 D1 31
URL-Quoted
%F0%9D%84%B1
HTML hex reference
𝄱
Wrong windows-1252 Mojibake
Γ°ΒβΒ±
Encoding: GB18030 (hex bytes)
94 32 C0 33
RFC 5137
\u'1D131'
Bash and Zsh inside echo -e
\U0001D131
C and C++
\U0001D131
C#
\U0001D131
CSS
\01D131
Excel
=UNICHAR(119089)
Go
\U0001D131
JavaScript
\uD834\uDD31
Modern JavaScript since ES6
\u{1d131}
JSON
\uD834\uDD31
Java
\uD834\uDD31
Lua
\u{1D131}
Matlab
char(119089)
Perl
"\x{1D131}"
PHP
\u{1d131}
PostgreSQL
U&'\+01D131'
PowerShell
`u{1D131}
Python
\U0001D131
Ruby
\u{1d131}
Rust
\u{1d131}
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