102131110031 has 4 divisors (see below), whose sum is σ = 102188200200. Its totient is φ = 102074019864.

The previous prime is 102131110021. The next prime is 102131110079. The reversal of 102131110031 is 130011131201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 102131110031 - 2¹⁸ = 102130847887 is a prime.

It is a super-2 number, since 2×102131110031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102131109988 and 102131110015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102131110021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28542401 + ... + 28545978.

It is an arithmetic number, because the mean of its divisors is an integer number (25547050050).

Almost surely, 2^102131110031 is an apocalyptic number.

102131110031 is a deficient number, since it is larger than the sum of its proper divisors (57090169).

102131110031 is an equidigital number, since it uses as much as digits as its factorization.

102131110031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57090168.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 102131110031 its reverse (130011131201), we get a palindrome (232142241232).

The spelling of 102131110031 in words is "one hundred two billion, one hundred thirty-one million, one hundred ten thousand, thirty-one".