21113000039 has 2 divisors, whose sum is σ = 21113000040. Its totient is φ = 21113000038.

The previous prime is 21113000017. The next prime is 21113000071. The reversal of 21113000039 is 93000031112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21113000039 - 2⁸ = 21112999783 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21118000039) 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, 10556500019 + 10556500020.

It is an arithmetic number, because the mean of its divisors is an integer number (10556500020).

Almost surely, 2^21113000039 is an apocalyptic number.

21113000039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113000039 is an equidigital number, since it uses as much as digits as its factorization.

21113000039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 20.

The spelling of 21113000039 in words is "twenty-one billion, one hundred thirteen million, thirty-nine", and thus it is an aban number.