31023111220013 has 32 divisors (see below), whose sum is σ = 35396181342720. Its totient is φ = 26942584253760.

The previous prime is 31023111220009. The next prime is 31023111220033. The reversal of 31023111220013 is 31002211132013.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31023111220013 - 2² = 31023111220009 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31023111220033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2676206 + ... + 8319152.

It is an arithmetic number, because the mean of its divisors is an integer number (1106130666960).

Almost surely, 2^{31023111220013} is an apocalyptic number.

It is an amenable number.

31023111220013 is a deficient number, since it is larger than the sum of its proper divisors (4373070122707).

31023111220013 is a wasteful number, since it uses less digits than its factorization.

31023111220013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5643257.

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

Adding to 31023111220013 its reverse (31002211132013), we get a palindrome (62025322352026).

The spelling of 31023111220013 in words is "thirty-one trillion, twenty-three billion, one hundred eleven million, two hundred twenty thousand, thirteen".