21002022179 has 2 divisors, whose sum is σ = 21002022180. Its totient is φ = 21002022178.

The previous prime is 21002022137. The next prime is 21002022211. The reversal of 21002022179 is 97122020012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002022179 - 2⁸ = 21002021923 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002322179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501011089 + 10501011090.

It is an arithmetic number, because the mean of its divisors is an integer number (10501011090).

Almost surely, 2^21002022179 is an apocalyptic number.

21002022179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002022179 is an equidigital number, since it uses as much as digits as its factorization.

21002022179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The spelling of 21002022179 in words is "twenty-one billion, two million, twenty-two thousand, one hundred seventy-nine".