31312122113 has 8 divisors (see below), whose sum is σ = 33116341920. Its totient is φ = 29523523680.

The previous prime is 31312122109. The next prime is 31312122139. The reversal of 31312122113 is 31122121313.

It is a happy number.

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 31312122113 - 2² = 31312122109 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31312122173) 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 7 ways as a sum of consecutive naturals, for example, 3901220 + ... + 3909237.

It is an arithmetic number, because the mean of its divisors is an integer number (4139542740).

Almost surely, 2^31312122113 is an apocalyptic number.

It is an amenable number.

31312122113 is a deficient number, since it is larger than the sum of its proper divisors (1804219807).

31312122113 is a wasteful number, since it uses less digits than its factorization.

31312122113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7810687.

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

Adding to 31312122113 its reverse (31122121313), we get a palindrome (62434243426).

The spelling of 31312122113 in words is "thirty-one billion, three hundred twelve million, one hundred twenty-two thousand, one hundred thirteen".