Code point
U+29B0
Glyph appearance depends on your fonts.
U+29B0
SmU+29B0 REVERSED EMPTY SET 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+29B0
10672
⦰
⦰
⦰
E2 A6 B0
29B0
000029B0
%E2%A6%B0
\u29B0
\u29B0
\u29B0
\29B0