As character names:

U+E0001 LANGUAGE TAG character (󠀁)

As raw characters:

󠀁

As a string of HTML entities:

󠀁

Decoder output:

Byte number 1 is decimal 243, hex 0xF3, octal \363, binary 11110011
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 160, hex 0xA0, octal \240, binary 10100000
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 128, hex 0x80, octal \200, binary 10000000
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 129, hex 0x81, octal \201, binary 10000001
This is continuation byte 3, expecting 0 more.

U+E0001	LANGUAGE TAG
	* This character is deprecated, and its use is strongly discouraged.