As character names:

U+2111 BLACK-LETTER CAPITAL I character (ℑ)

As raw characters:

ℑ

As a string of HTML entities:

ℑ

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 132, hex 0x84, octal \204, binary 10000100
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 145, hex 0x91, octal \221, binary 10010001
This is continuation byte 2, expecting 0 more.

U+2111	BLACK-LETTER CAPITAL I
	= imaginary part
	# <font> 0049 latin capital letter i