13031123220113 has 4 divisors (see below), whose sum is σ = 13032803145780. Its totient is φ = 13029443294448.

The previous prime is 13031123220107. The next prime is 13031123220149. The reversal of 13031123220113 is 31102232113031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5887086974224 + 7144036245889 = 2426332^2 + 2672833^2 .

It is a cyclic number.

It is not a de Polignac number, because 13031123220113 - 2⁴ = 13031123220097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13031123220103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 839951198 + ... + 839966711.

It is an arithmetic number, because the mean of its divisors is an integer number (3258200786445).

Almost surely, 2^{13031123220113} is an apocalyptic number.

It is an amenable number.

13031123220113 is a deficient number, since it is larger than the sum of its proper divisors (1679925667).

13031123220113 is an equidigital number, since it uses as much as digits as its factorization.

13031123220113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679925666.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 13031123220113 its reverse (31102232113031), we get a palindrome (44133355333144).

The spelling of 13031123220113 in words is "thirteen trillion, thirty-one billion, one hundred twenty-three million, two hundred twenty thousand, one hundred thirteen".