1313012311021 has 4 divisors (see below), whose sum is σ = 1313091277344. Its totient is φ = 1312933344700.

The previous prime is 1313012310941. The next prime is 1313012311027. The reversal of 1313012311021 is 1201132103131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1313012311021 - 2²⁵ = 1312978756589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1313012311021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313012311027) 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, 39458215 + ... + 39491476.

It is an arithmetic number, because the mean of its divisors is an integer number (328272819336).

Almost surely, 2^{1313012311021} is an apocalyptic number.

It is an amenable number.

1313012311021 is a deficient number, since it is larger than the sum of its proper divisors (78966323).

1313012311021 is an equidigital number, since it uses as much as digits as its factorization.

1313012311021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78966322.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1313012311021 its reverse (1201132103131), we get a palindrome (2514144414152).

The spelling of 1313012311021 in words is "one trillion, three hundred thirteen billion, twelve million, three hundred eleven thousand, twenty-one".