1331323322321 has 4 divisors (see below), whose sum is σ = 1331826280512. Its totient is φ = 1330820364132.

The previous prime is 1331323322293. The next prime is 1331323322447. The reversal of 1331323322321 is 1232233231331.

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 1331323322321 - 2³⁴ = 1314143453137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331323322821) 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, 251475125 + ... + 251480418.

It is an arithmetic number, because the mean of its divisors is an integer number (332956570128).

Almost surely, 2^{1331323322321} is an apocalyptic number.

It is an amenable number.

1331323322321 is a deficient number, since it is larger than the sum of its proper divisors (502958191).

1331323322321 is an equidigital number, since it uses as much as digits as its factorization.

1331323322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502958190.

The product of its digits is 11664, while the sum is 29.

Adding to 1331323322321 its reverse (1232233231331), we get a palindrome (2563556553652).

The spelling of 1331323322321 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-three million, three hundred twenty-two thousand, three hundred twenty-one".