Code point
U+29BB
Glyph appearance depends on your fonts.
U+29BB
SmU+29BB CIRCLE WITH SUPERIMPOSED X is a Unicode 16.0.0 character in the Math Symbol category. It belongs to the Miscellaneous Mathematical Symbols-B block.
Choose the representation you need, then copy its value.
U+29BB
10683
⦻
⦻
⦻
E2 A6 BB
29BB
000029BB
%E2%A6%BB
\u29BB
\u29BB
\u29BB
\29BB