Step 1: Determine the UTF-8 encoding bit layout
The character ㉑ has the Unicode code point U+3251. In UTF-8, it is encoded using 3 bytes because its codepoint is in the range of
0x0800to0xffff.
Therefore we know that the UTF-8 encoding will be done over 16 bits within the final 24 bits and that it will have the format:1110xxxx 10xxxxxx 10xxxxxx
Where thexare the payload bits.UTF-8 Encoding bit layout by codepoint range Codepoint Range Bytes Bit pattern Payload length U+0000 - U+007F 1 0xxxxxxx 7 bits U+0080 - U+07FF 2 110xxxxx 10xxxxxx 11 bits U+0800 - U+FFFF 3 1110xxxx 10xxxxxx 10xxxxxx 16 bits U+10000 - U+10FFFF 4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx 21 bits Step 2: Obtain the payload bits:
Convert the hexadecimal code point U+3251 to binary:
00110010 01010001. Those are the payload bits.Step 3: Fill in the bits to match the bit pattern:
Obtain the final bytes by arranging the paylod bits to match the bit layout:
11100011 10001001 10010001
CIRCLED NUMBER TWENTY ONE·U+3251
㉑
Character Information
Code Point
U+3251
HEX
3251
Unicode Plane
Basic Multilingual Plane
Category
Other Number
Character Representations
Click elements to copy| Encoding | Hex | Binary |
|---|---|---|
| UTF8 | E3 89 91 | 11100011 10001001 10010001 |
| UTF16 (big Endian) | 32 51 | 00110010 01010001 |
| UTF16 (little Endian) | 51 32 | 01010001 00110010 |
| UTF32 (big Endian) | 00 00 32 51 | 00000000 00000000 00110010 01010001 |
| UTF32 (little Endian) | 51 32 00 00 | 01010001 00110010 00000000 00000000 |
HTML Entity
㉑
URI Encoded
%E3%89%91
Description
U+3251, also known as the Circled Number Twenty One, is a typographical character that plays a significant role in digital text, particularly within mathematical equations, scientific notation, and computer programming languages. This unique symbol allows users to differentiate between numbers and variables, thus enhancing the readability and clarity of their work. The Circled Number Twenty One is often used in conjunction with other numerical symbols in a range of contexts, including statistical analysis, game design, and data representation. Its use can be traced back to traditional mathematical notation methods, where it was employed to denote the subscript or superscript position of numbers within equations or formulas. This character's inclusion in the Unicode standard has made it accessible and usable across a wide range of digital platforms and applications, contributing to its widespread adoption among professionals and enthusiasts alike.
How to type the ㉑ symbol on Windows
Hold Alt and type 12881 on the numpad. Or use Character Map.