As character names:

U+2789 DINGBAT CIRCLED SANS-SERIF NUMBER TEN character (➉)

As raw characters:

➉

As a string of HTML entities:

➉

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 158, hex 0x9E, octal \236, binary 10011110
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+2789	DINGBAT CIRCLED SANS-SERIF NUMBER TEN