21002013220999 has 2 divisors, whose sum is σ = 21002013221000. Its totient is φ = 21002013220998.

The previous prime is 21002013220957. The next prime is 21002013221107. The reversal of 21002013220999 is 99902231020012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002013220999 - 2¹¹ = 21002013218951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21002013220939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501006610499 + 10501006610500.

It is an arithmetic number, because the mean of its divisors is an integer number (10501006610500).

Almost surely, 2^{21002013220999} is an apocalyptic number.

21002013220999 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002013220999 is an equidigital number, since it uses as much as digits as its factorization.

21002013220999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 40.

The spelling of 21002013220999 in words is "twenty-one trillion, two billion, thirteen million, two hundred twenty thousand, nine hundred ninety-nine".