U+3251 CIRCLED NUMBER TWENTY ONE

The Unicode character U+3251, officially named CIRCLED NUMBER TWENTY ONE, was introduced in Unicode version 3.2. It is part of the Enclosed CJK block, which belongs to the Basic Multilingual plane.

Categorized technically as a Other Number, this character typically falls under the Common script. In terms of text layout and rendering, the glyph is Unknown and has wide in East Asian typography. When placed in bidirectional text, it behaves as an Other Neutral character. Its visual representation remains not mirrored regardless of the reading direction.