1331320222013 has 2 divisors, whose sum is σ = 1331320222014. Its totient is φ = 1331320222012.

The previous prime is 1331320221989. The next prime is 1331320222021. The reversal of 1331320222013 is 3102220231331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 871455856324 + 459864365689 = 933518^2 + 678133^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331320222013 - 2¹² = 1331320217917 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1331320222013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331320221013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665660111006 + 665660111007.

It is an arithmetic number, because the mean of its divisors is an integer number (665660111007).

Almost surely, 2^{1331320222013} is an apocalyptic number.

It is an amenable number.

1331320222013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331320222013 is an equidigital number, since it uses as much as digits as its factorization.

1331320222013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 1331320222013 its reverse (3102220231331), we get a palindrome (4433540453344).

The spelling of 1331320222013 in words is "one trillion, three hundred thirty-one billion, three hundred twenty million, two hundred twenty-two thousand, thirteen".