1321313231311 has 8 divisors (see below), whose sum is σ = 1334973429504. Its totient is φ = 1307723266080.

The previous prime is 1321313231269. The next prime is 1321313231317. The reversal of 1321313231311 is 1131323131231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321313231311 - 2¹⁹ = 1321312707023 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 (1321313231317) 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 7 ways as a sum of consecutive naturals, for example, 17520420 + ... + 17595673.

It is an arithmetic number, because the mean of its divisors is an integer number (166871678688).

Almost surely, 2^{1321313231311} is an apocalyptic number.

1321313231311 is a deficient number, since it is larger than the sum of its proper divisors (13660198193).

1321313231311 is a wasteful number, since it uses less digits than its factorization.

1321313231311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35116481.

The product of its digits is 972, while the sum is 25.

Adding to 1321313231311 its reverse (1131323131231), we get a palindrome (2452636362542).

The spelling of 1321313231311 in words is "one trillion, three hundred twenty-one billion, three hundred thirteen million, two hundred thirty-one thousand, three hundred eleven".