To encode codepoint 57372 in JavaScript, use '\ue01c'
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You should be aware that it won't render well, since unicode defines it as an unassigned codepoint in the private use area":
http://www.unicode.org/charts/PDF/UE000.pdf
Private Use Area
Range: E000-F8FF
The Private Use Area does not contain any character assignments, consequently no character code charts or names lists are provided for this area.
Maybe you meant another code-point.