U+F21F

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U+F21F is not a valid unicode character.
Encodings
HTML Entity (decimal) 
HTML Entity (hex) 
How to type in Microsoft Windows Alt +F21F
UTF-8 (hex) 0xEF 0x88 0x9F (ef889f)
UTF-8 (binary) 11101111:10001000:10011111
UTF-16 (hex) 0xF21F (f21f)
UTF-16 (decimal) 61,983
UTF-32 (hex) 0x0000F21F (f21f)
UTF-32 (decimal) 61,983
C/C++/Java source code "\uF21F"
Python source code u"\uF21F"
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Java Data
string.toUpperCase()
string.toLowerCase()
Character.UnicodeBlock PRIVATE_USE_AREA
Character.charCount() 1
Character.getDirectionality() DIRECTIONALITY_LEFT_TO_RIGHT [0]
Character.getNumericValue() -1
Character.getType() 18
Character.isDefined() Yes
Character.isDigit() No
Character.isIdentifierIgnorable() No
Character.isISOControl() No
Character.isJavaIdentifierPart() No
Character.isJavaIdentifierStart() No
Character.isLetter() No
Character.isLetterOrDigit() No
Character.isLowerCase() No
Character.isMirrored() No
Character.isSpaceChar() No
Character.isSupplementaryCodePoint() No
Character.isTitleCase() No
Character.isUnicodeIdentifierPart() No
Character.isUnicodeIdentifierStart() No
Character.isUpperCase() No
Character.isValidCodePoint() Yes
Character.isWhitespace() No