21260202179 has 2 divisors, whose sum is σ = 21260202180. Its totient is φ = 21260202178.

The previous prime is 21260202149. The next prime is 21260202203. The reversal of 21260202179 is 97120206212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21260202179 - 2⁸ = 21260201923 is a prime.

It is not a weakly prime, because it can be changed into another prime (21260202149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10630101089 + 10630101090.

It is an arithmetic number, because the mean of its divisors is an integer number (10630101090).

Almost surely, 2^21260202179 is an apocalyptic number.

21260202179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21260202179 is an equidigital number, since it uses as much as digits as its factorization.

21260202179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The spelling of 21260202179 in words is "twenty-one billion, two hundred sixty million, two hundred two thousand, one hundred seventy-nine".