21089875988161 has 8 divisors (see below), whose sum is σ = 21172339730304. Its totient is φ = 21007415362560.

The previous prime is 21089875988141. The next prime is 21089875988239. The reversal of 21089875988161 is 16188957898012.

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 21089875988161 - 2²⁵ = 21089842433729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21089875988141) 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, 13276116 + ... + 14779546.

It is an arithmetic number, because the mean of its divisors is an integer number (2646542466288).

Almost surely, 2^{21089875988161} is an apocalyptic number.

It is an amenable number.

21089875988161 is a deficient number, since it is larger than the sum of its proper divisors (82463742143).

21089875988161 is a wasteful number, since it uses less digits than its factorization.

21089875988161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1558271.

The product of its (nonzero) digits is 139345920, while the sum is 73.

The spelling of 21089875988161 in words is "twenty-one trillion, eighty-nine billion, eight hundred seventy-five million, nine hundred eighty-eight thousand, one hundred sixty-one".