1312021313111 has 4 divisors (see below), whose sum is σ = 1312045240800. Its totient is φ = 1311997385424.

The previous prime is 1312021313069. The next prime is 1312021313147. The reversal of 1312021313111 is 1113131202131.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312021313111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312021313171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11881406 + ... + 11991323.

It is an arithmetic number, because the mean of its divisors is an integer number (328011310200).

Almost surely, 2^{1312021313111} is an apocalyptic number.

1312021313111 is a deficient number, since it is larger than the sum of its proper divisors (23927689).

1312021313111 is an equidigital number, since it uses as much as digits as its factorization.

1312021313111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23927688.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1312021313111 its reverse (1113131202131), we get a palindrome (2425152515242).

The spelling of 1312021313111 in words is "one trillion, three hundred twelve billion, twenty-one million, three hundred thirteen thousand, one hundred eleven".