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+2231 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
The integral symbol:
is used to denote integrals and antiderivatives in mathematics, especially in calculus.
Representations
System
Representation (click value to copy)
Nº
8753
UTF-8
E2 88 B1
UTF-16
22 31
UTF-32
00 00 22 31
URL-Quoted
%E2%88%B1
HTML hex reference
∱
Wrong windows-1252 Mojibake
∱
HTML named entity
∱
Encoding: GB18030 (hex bytes)
81 36 D4 38
LATEX
\clwintegral
RFC 5137
\u'2231'
Bash and Zsh inside echo -e
\u2231
C and C++
\u2231
C#
\u2231
CSS
\002231
Excel
=UNICHAR(8753)
Go
\u2231
JavaScript
\u2231
Modern JavaScript since ES6
\u{2231}
JSON
\u2231
Java
\u2231
Lua
\u{2231}
Matlab
char(8753)
Perl
"\x{2231}"
PHP
\u{2231}
PostgreSQL
U&'\2231'
PowerShell
`u{2231}
Python
\u2231
Ruby
\u{2231}
Rust
\u{2231}
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