1331321311 has 2 divisors, whose sum is σ = 1331321312. Its totient is φ = 1331321310.

The previous prime is 1331321267. The next prime is 1331321333. The reversal of 1331321311 is 1131231331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1331321311 - 2²⁵ = 1297766879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331321111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660655 + 665660656.

It is an arithmetic number, because the mean of its divisors is an integer number (665660656).

Almost surely, 2^1331321311 is an apocalyptic number.

1331321311 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331321311 is an equidigital number, since it uses as much as digits as its factorization.

1331321311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 162, while the sum is 19.

The square root of 1331321311 is about 36487.2760150713. The cubic root of 1331321311 is about 1100.0885083052.

Adding to 1331321311 its reverse (1131231331), we get a palindrome (2462552642).

The spelling of 1331321311 in words is "one billion, three hundred thirty-one million, three hundred twenty-one thousand, three hundred eleven".