Undefined Character (U+13D81)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𓶁` `𓶁`
UTF-8 Encoding:	`0xF0 0x93 0xB6 0x81`
UTF-16 Encoding:	`0xD80F 0xDD81`
UTF-32 Encoding:	`0x00013D81`

References