22001122221 has 32 divisors (see below), whose sum is σ = 32150767488. Its totient is φ = 13301452800.

The previous prime is 22001122211. The next prime is 22001122229. The reversal of 22001122221 is 12222110022.

It is not a de Polignac number, because 22001122221 - 2¹⁷ = 22000991149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22001122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22001122229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 497046 + ... + 539496.

It is an arithmetic number, because the mean of its divisors is an integer number (1004711484).

Almost surely, 2^22001122221 is an apocalyptic number.

It is an amenable number.

22001122221 is a deficient number, since it is larger than the sum of its proper divisors (10149645267).

22001122221 is a wasteful number, since it uses less digits than its factorization.

22001122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42701.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 22001122221 its reverse (12222110022), we get a palindrome (34223232243).

The spelling of 22001122221 in words is "twenty-two billion, one million, one hundred twenty-two thousand, two hundred twenty-one".