Kayah Li Digit One
HTML Entity Browser Test:

U+A901 is the Unicode hex value of the character Kayah Li Digit One, which is categorized as "decimal digit number" in the Unicode 6.0 character table.

Unicode Character Information
Unicode Hex U+A901
General Category Decimal Digit Number [Code: Nd]
Canonical Combining Class 0
Bidirectional Category L
Numeric Value 1
Mirrored N
Unicode Character Encodings
Kayah Li Digit One HTML Entity ꤁ (decimal entity), ꤁ (hex entity)
Windows Key Code Alt 43265 or Alt +A9011
Programming Source Code Encodings Python hex: u"\uA901", Hex for C++ and Java: "\uA901"
UTF-8 Hexadecimal Encoding 0xEAA481
1 To type a Unicode symbol in Windows, hold down the ALT key and enter the decimal or hexadecimal code provided using the numeric keypad. The decimal alt code (Alt 43265) will only work on computers with support for this Unicode character in the active code page. The hexadecimal alt code (Alt +A901) will work for all Unicode characters provided Hex input from the numeric keypad is enabled.
* If the Kayah Li Digit One character does not display correctly in your browser, you may not have a Unicode font on your system that supports this particular symbol.