Undefined Character (U+13991)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𓦑` `𓦑`
UTF-8 Encoding:	`0xF0 0x93 0xA6 0x91`
UTF-16 Encoding:	`0xD80E 0xDD91`
UTF-32 Encoding:	`0x00013991`

References