21122201121999 has 16 divisors (see below), whose sum is σ = 28431746095104. Its totient is φ = 13947233552000.

The previous prime is 21122201121781. The next prime is 21122201122007. The reversal of 21122201121999 is 99912110222112.

It is a cyclic number.

It is not a de Polignac number, because 21122201121999 - 2⁸ = 21122201121743 is a prime.

It is a super-2 number, since 2×21122201121999² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21122201121999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122201121199) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20978607 + ... + 21962384.

It is an arithmetic number, because the mean of its divisors is an integer number (1776984130944).

Almost surely, 2^{21122201121999} is an apocalyptic number.

21122201121999 is a deficient number, since it is larger than the sum of its proper divisors (7309544973105).

21122201121999 is a wasteful number, since it uses less digits than its factorization.

21122201121999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42942558.

The product of its (nonzero) digits is 23328, while the sum is 42.

The spelling of 21122201121999 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred one million, one hundred twenty-one thousand, nine hundred ninety-nine".