As character names:

U+2981 Z NOTATION SPOT 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 166, hex 0xA6, octal \246, binary 10100110
This is continuation byte 1, expecting 1 more.

Byte number 3 is decimal 129, hex 0x81, octal \201, binary 10000001
This is continuation byte 2, expecting 0 more.

U+2981	Z NOTATION SPOT
	* medium-small-sized black circle
	x (bullet operator - 2219)
	x (black circle - 25CF)