21012202002179 has 2 divisors, whose sum is σ = 21012202002180. Its totient is φ = 21012202002178.

The previous prime is 21012202002163. The next prime is 21012202002227. The reversal of 21012202002179 is 97120020221012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21012202002179 - 2⁴ = 21012202002163 is a prime.

It is not a weakly prime, because it can be changed into another prime (21012202002149) 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, 10506101001089 + 10506101001090.

It is an arithmetic number, because the mean of its divisors is an integer number (10506101001090).

Almost surely, 2^{21012202002179} is an apocalyptic number.

21012202002179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21012202002179 is an equidigital number, since it uses as much as digits as its factorization.

21012202002179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 29.

The spelling of 21012202002179 in words is "twenty-one trillion, twelve billion, two hundred two million, two thousand, one hundred seventy-nine".