123031131020 has 48 divisors (see below), whose sum is σ = 295552846848. Its totient is φ = 42142368960.

The previous prime is 123031130941. The next prime is 123031131049. The reversal of 123031131020 is 20131130321.

It is a self number, because there is not a number n which added to its sum of digits gives 123031131020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264536 + ... + 562175.

It is an arithmetic number, because the mean of its divisors is an integer number (6157350976).

Almost surely, 2^123031131020 is an apocalyptic number.

123031131020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123031131020 is an abundant number, since it is smaller than the sum of its proper divisors (172521715828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123031131020 is a wasteful number, since it uses less digits than its factorization.

123031131020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827790 (or 827788 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 123031131020 its reverse (20131130321), we get a palindrome (143162261341).

The spelling of 123031131020 in words is "one hundred twenty-three billion, thirty-one million, one hundred thirty-one thousand, twenty".