21001020110179 has 2 divisors, whose sum is σ = 21001020110180. Its totient is φ = 21001020110178.

The previous prime is 21001020110143. The next prime is 21001020110243. The reversal of 21001020110179 is 97101102010012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21001020110179 - 2²⁷ = 21000885892451 is a prime.

It is not a weakly prime, because it can be changed into another prime (21001020110129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500510055089 + 10500510055090.

It is an arithmetic number, because the mean of its divisors is an integer number (10500510055090).

Almost surely, 2^{21001020110179} is an apocalyptic number.

21001020110179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21001020110179 is an equidigital number, since it uses as much as digits as its factorization.

21001020110179 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 25.

The spelling of 21001020110179 in words is "twenty-one trillion, one billion, twenty million, one hundred ten thousand, one hundred seventy-nine".