31001312123 has 8 divisors (see below), whose sum is σ = 31296188160. Its totient is φ = 30706531560.

The previous prime is 31001312119. The next prime is 31001312131. The reversal of 31001312123 is 32121310013.

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 31001312123 - 2² = 31001312119 is a prime.

It is a super-2 number, since 2×31001312123² (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 (31001312143) 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, 745778 + ... + 786248.

It is an arithmetic number, because the mean of its divisors is an integer number (3912023520).

Almost surely, 2^31001312123 is an apocalyptic number.

31001312123 is a deficient number, since it is larger than the sum of its proper divisors (294876037).

31001312123 is a wasteful number, since it uses less digits than its factorization.

31001312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47737.

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

Adding to 31001312123 its reverse (32121310013), we get a palindrome (63122622136).

The spelling of 31001312123 in words is "thirty-one billion, one million, three hundred twelve thousand, one hundred twenty-three".