Undefined Character (U+16D91)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𖶑` `𖶑`
UTF-8 Encoding:	`0xF0 0x96 0xB6 0x91`
UTF-16 Encoding:	`0xD81B 0xDD91`
UTF-32 Encoding:	`0x00016D91`

References