1331322323291 has 2 divisors, whose sum is σ = 1331322323292. Its totient is φ = 1331322323290.

The previous prime is 1331322323269. The next prime is 1331322323311. The reversal of 1331322323291 is 1923232231331.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1331322323291 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331322323231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665661161645 + 665661161646.

It is an arithmetic number, because the mean of its divisors is an integer number (665661161646).

Almost surely, 2^{1331322323291} is an apocalyptic number.

1331322323291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331322323291 is an equidigital number, since it uses as much as digits as its factorization.

1331322323291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34992, while the sum is 35.

The spelling of 1331322323291 in words is "one trillion, three hundred thirty-one billion, three hundred twenty-two million, three hundred twenty-three thousand, two hundred ninety-one".