131231203102 has 4 divisors (see below), whose sum is σ = 196846804656. Its totient is φ = 65615601550.

The previous prime is 131231203087. The next prime is 131231203133. The reversal of 131231203102 is 201302132131.

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

It is a self number, because there is not a number n which added to its sum of digits gives 131231203102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32807800774 + ... + 32807800777.

It is an arithmetic number, because the mean of its divisors is an integer number (49211701164).

Almost surely, 2^131231203102 is an apocalyptic number.

131231203102 is a deficient number, since it is larger than the sum of its proper divisors (65615601554).

131231203102 is an equidigital number, since it uses as much as digits as its factorization.

131231203102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65615601553.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 131231203102 its reverse (201302132131), we get a palindrome (332533335233).

The spelling of 131231203102 in words is "one hundred thirty-one billion, two hundred thirty-one million, two hundred three thousand, one hundred two".