This property defines the Unicodes which are Other Letters
Characters like ª,º,ƻ, etc. are listed under Other Letter General Category.
131612 Characters are present in Other Letter General Category starting with the Unicode point U+00AA that represents the character ª.
Currently, as per latest version 15.0.0, Unicode supports 30 number of General Category. Here are a few examples - Close Punctuation,Connector Punctuation,Control Character, etc.