21023264113 has 2 divisors, whose sum is σ = 21023264114. Its totient is φ = 21023264112.

The previous prime is 21023264069. The next prime is 21023264161. The reversal of 21023264113 is 31146232012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20888053729 + 135210384 = 144527^2 + 11628^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023264113 - 2²⁵ = 20989709681 is a prime.

It is not a weakly prime, because it can be changed into another prime (21023264413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511632056 + 10511632057.

It is an arithmetic number, because the mean of its divisors is an integer number (10511632057).

Almost surely, 2^21023264113 is an apocalyptic number.

It is an amenable number.

21023264113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023264113 is an equidigital number, since it uses as much as digits as its factorization.

21023264113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21023264113 its reverse (31146232012), we get a palindrome (52169496125).

The spelling of 21023264113 in words is "twenty-one billion, twenty-three million, two hundred sixty-four thousand, one hundred thirteen".