This character is a Other Letter and is mainly used in the Ethiopic 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+1234 forms with similar adjacent characters prevents a line break inside it.
The Wikipedia has the following information about this codepoint:
Śat (ሰ) is a letter of the Ge'ez abugida, descended from South Arabian 𐩪. It represents both a historical "s" /s/ (a voiceless alveolar fricative), like the s in sink and "ṯ" /θ/ (a voiceless dental fricative), like the th in think.
Representations
System
Representation (click value to copy)
Nº
4660
UTF-8
E1 88 B4
UTF-16
12 34
UTF-32
00 00 12 34
URL-Quoted
%E1%88%B4
HTML hex reference
ሴ
Wrong windows-1252 Mojibake
ሴ
Encoding: GB18030 (hex bytes)
81 33 BC 34
RFC 5137
\u'1234'
Bash and Zsh inside echo -e
\u1234
C and C++
\u1234
C#
\u1234
CSS
\001234
Excel
=UNICHAR(4660)
Go
\u1234
JavaScript
\u1234
Modern JavaScript since ES6
\u{1234}
JSON
\u1234
Java
\u1234
Lua
\u{1234}
Matlab
char(4660)
Perl
"\x{1234}"
PHP
\u{1234}
PostgreSQL
U&'\1234'
PowerShell
`u{1234}
Python
\u1234
Ruby
\u{1234}
Rust
\u{1234}
Click the star button next to each label to set this representation as favorite or remove it from the favorites. Favorites will be shown initially. (Favorites are stored locally on your computer and never sent over the internet.)