IntegerReverse

IntegerReverse[n] gives the integer whose digits are reversed with respect to those of the integer n.

• IntegerReverse[n, b] gives the integer whose digits in base b are reversed with respect to those of n.
• IntegerReverse[n, b, len] gives the integer with reversed digits after padding n with zeros on the left to have len digits.

Examples

IntegerReverse[12345]

IntegerReverse[12, 2]

Please visit the official Wolfram Language Reference for more details.