31210031123 has 12 divisors (see below), whose sum is σ = 33226103160. Its totient is φ = 29235038976.

The previous prime is 31210031117. The next prime is 31210031141. The reversal of 31210031123 is 32113001213.

It is not a de Polignac number, because 31210031123 - 2²⁰ = 31208982547 is a prime.

It is a super-2 number, since 2×31210031123² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31210031323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46811 + ... + 254187.

It is an arithmetic number, because the mean of its divisors is an integer number (2768841930).

Almost surely, 2^31210031123 is an apocalyptic number.

31210031123 is a deficient number, since it is larger than the sum of its proper divisors (2016072037).

31210031123 is an equidigital number, since it uses as much as digits as its factorization.

31210031123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207574 (or 207485 counting only the distinct ones).

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

Adding to 31210031123 its reverse (32113001213), we get a palindrome (63323032336).

The spelling of 31210031123 in words is "thirty-one billion, two hundred ten million, thirty-one thousand, one hundred twenty-three".