31234120113 has 32 divisors (see below), whose sum is σ = 48637345536. Its totient is φ = 17459140608.

The previous prime is 31234120103. The next prime is 31234120117. The reversal of 31234120113 is 31102143213.

It is not a de Polignac number, because 31234120113 - 2⁴ = 31234120097 is a prime.

It is a super-2 number, since 2×31234120113² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31234120113.

It is not an unprimeable number, because it can be changed into a prime (31234120117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 333445 + ... + 416717.

It is an arithmetic number, because the mean of its divisors is an integer number (1519917048).

Almost surely, 2^31234120113 is an apocalyptic number.

It is an amenable number.

31234120113 is a deficient number, since it is larger than the sum of its proper divisors (17403225423).

31234120113 is a wasteful number, since it uses less digits than its factorization.

31234120113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83673.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 31234120113 its reverse (31102143213), we get a palindrome (62336263326).

The spelling of 31234120113 in words is "thirty-one billion, two hundred thirty-four million, one hundred twenty thousand, one hundred thirteen".