Undefined Character (U+11B21)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𑬡` `𑬡`
UTF-8 Encoding:	`0xF0 0x91 0xAC 0xA1`
UTF-16 Encoding:	`0xD806 0xDF21`
UTF-32 Encoding:	`0x00011B21`

References