31131332123 has 8 divisors (see below), whose sum is σ = 31682223360. Its totient is φ = 30581215720.

The previous prime is 31131332083. The next prime is 31131332149. The reversal of 31131332123 is 32123313113.

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

It is a cyclic number.

It is not a de Polignac number, because 31131332123 - 2⁸ = 31131331867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31131332723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112343 + ... + 273648.

It is an arithmetic number, because the mean of its divisors is an integer number (3960277920).

Almost surely, 2^31131332123 is an apocalyptic number.

31131332123 is a deficient number, since it is larger than the sum of its proper divisors (550891237).

31131332123 is a wasteful number, since it uses less digits than its factorization.

31131332123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387417.

The product of its digits is 972, while the sum is 23.

Adding to 31131332123 its reverse (32123313113), we get a palindrome (63254645236).

The spelling of 31131332123 in words is "thirty-one billion, one hundred thirty-one million, three hundred thirty-two thousand, one hundred twenty-three".