U+2140 DOUBLE-STRUCK N-ARY SUMMATION

The Unicode character U+2140, officially named DOUBLE-STRUCK N-ARY SUMMATION, was introduced in Unicode version 3.2. It is part of the Letterlike Symbols block, which belongs to the Basic Multilingual plane.

Categorized technically as a Math Symbol, this character typically falls under the Common script. In terms of text layout and rendering, the glyph is Unknown and has no designated width in East Asian typography. When placed in bidirectional text, it behaves as an Other Neutral character. Its visual representation remains mirrored regardless of the reading direction.