102131256225 has 24 divisors (see below), whose sum is σ = 177744223840. Its totient is φ = 51603160320.

The previous prime is 102131256211. The next prime is 102131256233. The reversal of 102131256225 is 522652131201.

It is not a de Polignac number, because 102131256225 - 2⁵ = 102131256193 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102131256192 and 102131256201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 35834104 + ... + 35836953.

Almost surely, 2^102131256225 is an apocalyptic number.

102131256225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102131256225 is a deficient number, since it is larger than the sum of its proper divisors (75612967615).

102131256225 is a wasteful number, since it uses less digits than its factorization.

102131256225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71671089 (or 71671084 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 102131256225 its reverse (522652131201), we get a palindrome (624783387426).

The spelling of 102131256225 in words is "one hundred two billion, one hundred thirty-one million, two hundred fifty-six thousand, two hundred twenty-five".