As character names:

U+2349 APL FUNCTIONAL SYMBOL CIRCLE BACKSLASH 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 141, hex 0x8D, octal \215, binary 10001101
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 137, hex 0x89, octal \211, binary 10001001
This is continuation byte 2, expecting 0 more.

U+2349	APL FUNCTIONAL SYMBOL CIRCLE BACKSLASH
	x (reversed empty set - 29B0)