21110022009979 has 8 divisors (see below), whose sum is σ = 25544900583648. Its totient is φ = 17029933722240.

The previous prime is 21110022009961. The next prime is 21110022009997. The reversal of 21110022009979 is 97990022001112.

It is an interprime number because it is at equal distance from previous prime (21110022009961) and next prime (21110022009997).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21110022009979 - 2⁷ = 21110022009851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21110022009779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88697571352 + ... + 88697571589.

It is an arithmetic number, because the mean of its divisors is an integer number (3193112572956).

Almost surely, 2^{21110022009979} is an apocalyptic number.

21110022009979 is a deficient number, since it is larger than the sum of its proper divisors (4434878573669).

21110022009979 is a wasteful number, since it uses less digits than its factorization.

21110022009979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177395142965.

The product of its (nonzero) digits is 40824, while the sum is 43.

The spelling of 21110022009979 in words is "twenty-one trillion, one hundred ten billion, twenty-two million, nine thousand, nine hundred seventy-nine".