1331311323323 has 4 divisors (see below), whose sum is σ = 1401380340360. Its totient is φ = 1261242306288.

The previous prime is 1331311323289. The next prime is 1331311323347. The reversal of 1331311323323 is 3233231131331.

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

It is a cyclic number.

It is not a de Polignac number, because 1331311323323 - 2²⁰ = 1331310274747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331311322323) 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, 35034508490 + ... + 35034508527.

It is an arithmetic number, because the mean of its divisors is an integer number (350345085090).

Almost surely, 2^{1331311323323} is an apocalyptic number.

1331311323323 is a deficient number, since it is larger than the sum of its proper divisors (70069017037).

1331311323323 is an equidigital number, since it uses as much as digits as its factorization.

1331311323323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70069017036.

The product of its digits is 8748, while the sum is 29.

Adding to 1331311323323 its reverse (3233231131331), we get a palindrome (4564542454654).

The spelling of 1331311323323 in words is "one trillion, three hundred thirty-one billion, three hundred eleven million, three hundred twenty-three thousand, three hundred twenty-three".