21030994711613 has 2 divisors, whose sum is σ = 21030994711614. Its totient is φ = 21030994711612.

The previous prime is 21030994711577. The next prime is 21030994711651. The reversal of 21030994711613 is 31611749903012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18658710902329 + 2372283809284 = 4319573^2 + 1540222^2 .

It is a cyclic number.

It is not a de Polignac number, because 21030994711613 - 2³⁸ = 20756116804669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21030994741613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10515497355806 + 10515497355807.

It is an arithmetic number, because the mean of its divisors is an integer number (10515497355807).

Almost surely, 2^{21030994711613} is an apocalyptic number.

It is an amenable number.

21030994711613 is a deficient number, since it is larger than the sum of its proper divisors (1).

21030994711613 is an equidigital number, since it uses as much as digits as its factorization.

21030994711613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 47.

The spelling of 21030994711613 in words is "twenty-one trillion, thirty billion, nine hundred ninety-four million, seven hundred eleven thousand, six hundred thirteen".