This character is a Otro símbolo 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+2421 forms with similar adjacent characters prevents a line break inside it.
El Wikipedia tiene la siguiente información acerca de este punto de código:
The delete control character (also called DEL or rubout) is the last character in the ASCII repertoire, with the code 127. It is supposed to do nothing and was designed to erase incorrect characters on paper tape. It is denoted as ^? in caret notation and is U+007F in Unicode.
Terminal emulators may produce DEL when ← Backspace key or Control+← Backspace or Control+? are typed.
Representaciones
Sistema
Representación (click value to copy)
N.º
9249
UTF-8
E2 90 A1
UTF-16
24 21
UTF-32
00 00 24 21
URL-Quoted
%E2%90%A1
HTML hex reference
␡
Mojibake mal de windows-1252
â¡
Codificación: GB18030 (hexadecimales bytes)
81 37 86 33
RFC 5137
\u'2421'
Bash and Zsh inside echo -e
\u2421
C and C++
\u2421
C#
\u2421
CSS
\002421
Excel
=UNICHAR(9249)
Go
\u2421
JavaScript
\u2421
Modern JavaScript since ES6
\u{2421}
JSON
\u2421
Java
\u2421
Lua
\u{2421}
Matlab
char(9249)
Perl
"\x{2421}"
PHP
\u{2421}
PostgreSQL
U&'\2421'
PowerShell
`u{2421}
Python
\u2421
Ruby
\u{2421}
Rust
\u{2421}
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