As character names:

U+24BF CIRCLED LATIN CAPITAL LETTER J character (Ⓙ)

As raw characters:

Ⓙ

As a string of HTML entities:

Ⓙ

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 146, hex 0x92, octal \222, binary 10010010
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+24BF	CIRCLED LATIN CAPITAL LETTER J
	# <circle> 004A