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 acts as Other Neutral. When changing direction it is not mirrored. The word that U+241A forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
In computer data, a substitute character (␚) is a control character that is used to pad transmitted data in order to send it in blocks of fixed size, or to stand in place of a character that is recognized to be invalid, erroneous or unrepresentable on a given device. It is also used as an escape sequence in some programming languages.
In the ASCII character set, this character is encoded by the number 26 (1A hex). Standard keyboards transmit this code when the Ctrl and Z keys are pressed simultaneously (Ctrl+Z, often documented by convention as ^Z). Unicode inherits this character from ASCII, but recommends that the replacement character (�, U+FFFD) be used instead to represent un-decodable inputs, when the output encoding is compatible with it.
Representations
System
Representation (click value to copy)
Nº
9242
UTF-8
E2 90 9A
UTF-16
24 1A
UTF-32
00 00 24 1A
URL-Quoted
%E2%90%9A
HTML hex reference
␚
Wrong windows-1252 Mojibake
âš
Encoding: GB18030 (hex bytes)
81 37 85 36
RFC 5137
\u'241A'
Bash and Zsh inside echo -e
\u241A
C and C++
\u241A
C#
\u241A
CSS
\00241A
Excel
=UNICHAR(9242)
Go
\u241A
JavaScript
\u241A
Modern JavaScript since ES6
\u{241a}
JSON
\u241A
Java
\u241A
Lua
\u{241A}
Matlab
char(9242)
Perl
"\x{241A}"
PHP
\u{241a}
PostgreSQL
U&'\241A'
PowerShell
`u{241A}
Python
\u241A
Ruby
\u{241a}
Rust
\u{241a}
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