21113161024693 has 2 divisors, whose sum is σ = 21113161024694. Its totient is φ = 21113161024692.

The previous prime is 21113161024633. The next prime is 21113161024729. The reversal of 21113161024693 is 39642016131112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17217661439889 + 3895499584804 = 4149417^2 + 1973702^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113161024693 - 2⁹ = 21113161024181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113161024633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556580512346 + 10556580512347.

It is an arithmetic number, because the mean of its divisors is an integer number (10556580512347).

Almost surely, 2^{21113161024693} is an apocalyptic number.

It is an amenable number.

21113161024693 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113161024693 is an equidigital number, since it uses as much as digits as its factorization.

21113161024693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 21113161024693 in words is "twenty-one trillion, one hundred thirteen billion, one hundred sixty-one million, twenty-four thousand, six hundred ninety-three".