21002201179 has 2 divisors, whose sum is σ = 21002201180. Its totient is φ = 21002201178.

The previous prime is 21002201177. The next prime is 21002201249. The reversal of 21002201179 is 97110220012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21002201179 - 2¹ = 21002201177 is a prime.

Together with 21002201177, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21002201177) 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, 10501100589 + 10501100590.

It is an arithmetic number, because the mean of its divisors is an integer number (10501100590).

Almost surely, 2^21002201179 is an apocalyptic number.

21002201179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002201179 is an equidigital number, since it uses as much as digits as its factorization.

21002201179 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 25.

The spelling of 21002201179 in words is "twenty-one billion, two million, two hundred one thousand, one hundred seventy-nine".