31131203120102 has 8 divisors (see below), whose sum is σ = 46814428874496. Its totient is φ = 15526393495272.

The previous prime is 31131203120099. The next prime is 31131203120131. The reversal of 31131203120102 is 20102130213113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19604031398 + ... + 19604032985.

It is an arithmetic number, because the mean of its divisors is an integer number (5851803609312).

Almost surely, 2^{31131203120102} is an apocalyptic number.

31131203120102 is a deficient number, since it is larger than the sum of its proper divisors (15683225754394).

31131203120102 is a wasteful number, since it uses less digits than its factorization.

31131203120102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39208064782.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 31131203120102 its reverse (20102130213113), we get a palindrome (51233333333215).

The spelling of 31131203120102 in words is "thirty-one trillion, one hundred thirty-one billion, two hundred three million, one hundred twenty thousand, one hundred two".