22201222121 has 32 divisors (see below), whose sum is σ = 25423372800. Its totient is φ = 19231027200.

The previous prime is 22201222093. The next prime is 22201222157. The reversal of 22201222121 is 12122210222.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 22201222121 - 2²⁶ = 22134113257 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22201222121.

It is not an unprimeable number, because it can be changed into a prime (22201222321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8187956 + ... + 8190666.

It is an arithmetic number, because the mean of its divisors is an integer number (794480400).

Almost surely, 2^22201222121 is an apocalyptic number.

It is an amenable number.

22201222121 is a deficient number, since it is larger than the sum of its proper divisors (3222150679).

22201222121 is a wasteful number, since it uses less digits than its factorization.

22201222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3257.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 22201222121 its reverse (12122210222), we get a palindrome (34323432343).

The spelling of 22201222121 in words is "twenty-two billion, two hundred one million, two hundred twenty-two thousand, one hundred twenty-one".