U+2A27 Plus Sign with Subscript Two
U+2A27 was added in Unicode version 3.2 in 2002. It belongs to the block
This character is a Math Symbol and is commonly used, that is, in no specific script. The character is also known as nimaddition.
The glyph is not a composition. It has no designated width in East Asian texts. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. The word that U+2A27 forms with similar adjacent characters prevents a line break inside it. The glyph can be confused with one other glyph.
The CLDR project calls this character “plus subscript two” for use in screen reading software.
The Wikipedia has the following information about this codepoint:
In mathematics, the nimbers, also called Grundy numbers, are introduced in combinatorial game theory, where they are defined as the values of heaps in the game Nim. The nimbers are the ordinal numbers endowed with nimber addition and nimber multiplication, which are distinct from ordinal addition and ordinal multiplication.
Because of the Sprague–Grundy theorem which states that every impartial game is equivalent to a Nim heap of a certain size, nimbers arise in a much larger class of impartial games. They may also occur in partisan games like Domineering.
The nimber addition and multiplication operations are associative and commutative. Each nimber is its own additive inverse. In particular for some pairs of ordinals, their nimber sum is smaller than either addend. The minimum excludant operation is applied to sets of nimbers.
Representations
System  Representation 

Nº  10791 
UTF8  E2 A8 A7 
UTF16  2A 27 
UTF32  00 00 2A 27 
URLQuoted  %E2%A8%A7 
HTML hex reference  ⨧ 
Wrong windows1252 Mojibake  â¨§ 
HTML named entity  ⨧ 
alias  nimaddition 
Related Characters
Confusables
Elsewhere
Complete Record
Property  Value 

3.2 (2002)  
PLUS SIGN WITH SUBSCRIPT TWO  
—  
Supplemental ArrowsC  
Math Symbol  
Common  
Other Neutral  
Not Reordered  
none  


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R 