Undefined Character (U+138F9)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𓣹` `𓣹`
UTF-8 Encoding:	`0xF0 0x93 0xA3 0xB9`
UTF-16 Encoding:	`0xD80E 0xDCF9`
UTF-32 Encoding:	`0x000138F9`

References