As character names:

U+247F PARENTHESIZED NUMBER TWELVE character (⑿)

As raw characters:

⑿

As a string of HTML entities:

⑿

Decoder output:

Byte number 1 is decimal 226, hex 0xE2, octal \342, binary 11100010
This is the first byte of a 3 byte sequence.

Byte number 2 is decimal 145, hex 0x91, octal \221, binary 10010001
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 191, hex 0xBF, octal \277, binary 10111111
This is continuation byte 2, expecting 0 more.

U+247F	PARENTHESIZED NUMBER TWELVE
	# 0028 0031 0032 0029