1313021012331 has 8 divisors (see below), whose sum is σ = 2000793923584. Its totient is φ = 750297721320.

The previous prime is 1313021012321. The next prime is 1313021012333. The reversal of 1313021012331 is 1332101203131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1313021012331 is a prime.

It is a super-2 number, since 2×1313021012331² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 62524810111 = 1313021012331 / (1 + 3 + 1 + 3 + 0 + 2 + 1 + 0 + 1 + 2 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313021012298 and 1313021012307.

It is not an unprimeable number, because it can be changed into a prime (1313021012333) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31262405035 + ... + 31262405076.

It is an arithmetic number, because the mean of its divisors is an integer number (250099240448).

Almost surely, 2^{1313021012331} is an apocalyptic number.

1313021012331 is a deficient number, since it is larger than the sum of its proper divisors (687772911253).

1313021012331 is an equidigital number, since it uses as much as digits as its factorization.

1313021012331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62524810121.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1313021012331 its reverse (1332101203131), we get a palindrome (2645122215462).

The spelling of 1313021012331 in words is "one trillion, three hundred thirteen billion, twenty-one million, twelve thousand, three hundred thirty-one".