Undefined Character (U+13EF9)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𓻹` `𓻹`
UTF-8 Encoding:	`0xF0 0x93 0xBB 0xB9`
UTF-16 Encoding:	`0xD80F 0xDEF9`
UTF-32 Encoding:	`0x00013EF9`

References