213031661220013 has 2 divisors, whose sum is σ = 213031661220014. Its totient is φ = 213031661220012.

The previous prime is 213031661219921. The next prime is 213031661220017. The reversal of 213031661220013 is 310022166130312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130464870982884 + 82566790237129 = 11422122^2 + 9086627^2 .

It is a cyclic number.

It is not a de Polignac number, because 213031661220013 - 2²¹ = 213031659122861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213031661220017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106515830610006 + 106515830610007.

It is an arithmetic number, because the mean of its divisors is an integer number (106515830610007).

Almost surely, 2^{213031661220013} is an apocalyptic number.

It is an amenable number.

213031661220013 is a deficient number, since it is larger than the sum of its proper divisors (1).

213031661220013 is an equidigital number, since it uses as much as digits as its factorization.

213031661220013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 213031661220013 in words is "two hundred thirteen trillion, thirty-one billion, six hundred sixty-one million, two hundred twenty thousand, thirteen".