21102201179 has 2 divisors, whose sum is σ = 21102201180. Its totient is φ = 21102201178.

The previous prime is 21102201163. The next prime is 21102201181. The reversal of 21102201179 is 97110220112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102201179 - 2⁴ = 21102201163 is a prime.

Together with 21102201181, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21102201479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551100589 + 10551100590.

It is an arithmetic number, because the mean of its divisors is an integer number (10551100590).

Almost surely, 2^21102201179 is an apocalyptic number.

21102201179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102201179 is an equidigital number, since it uses as much as digits as its factorization.

21102201179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 26.

The spelling of 21102201179 in words is "twenty-one billion, one hundred two million, two hundred one thousand, one hundred seventy-nine".