21101300179 has 2 divisors, whose sum is σ = 21101300180. Its totient is φ = 21101300178.

The previous prime is 21101300149. The next prime is 21101300243. The reversal of 21101300179 is 97100310112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21101300179 - 2²³ = 21092911571 is a prime.

It is not a weakly prime, because it can be changed into another prime (21101300149) 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, 10550650089 + 10550650090.

It is an arithmetic number, because the mean of its divisors is an integer number (10550650090).

Almost surely, 2^21101300179 is an apocalyptic number.

21101300179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101300179 is an equidigital number, since it uses as much as digits as its factorization.

21101300179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The spelling of 21101300179 in words is "twenty-one billion, one hundred one million, three hundred thousand, one hundred seventy-nine".