Letterlike Symbols: Addressed To the Subject

℁

U+2101

℁

Noto text font

Plane: 0 (Basic Multilingual)
Block: Letterlike Symbols
Unicode Version: 1.1

UTF-32BE: 00 00 21 01
UTF-32LE: 01 21 00 00
UTF-16BE: 21 01
UTF-16LE: 01 21
UTF-8: E2 84 81

Character Escapes

HTML5: ℁; ℁
C: \u2101 (C99); \U002101 (C99)
C++: \u{2101} (C++23); \U00002101; \u2101
Java: \u2101
JavaScript: \u{2101}; \u2101
CSS: \2101; \002101
Quoted-Printable: =E2=84=81
URL: %E2%84%81