22122022121 has 8 divisors (see below), whose sum is σ = 23160574080. Its totient is φ = 21101851792.

The previous prime is 22122022073. The next prime is 22122022159. The reversal of 22122022121 is 12122022122.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22122022121 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 22122022121.

It is not an unprimeable number, because it can be changed into a prime (22122022421) 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, 4592945 + ... + 4597758.

It is an arithmetic number, because the mean of its divisors is an integer number (2895071760).

Almost surely, 2^22122022121 is an apocalyptic number.

It is an amenable number.

22122022121 is a deficient number, since it is larger than the sum of its proper divisors (1038551959).

22122022121 is an equidigital number, since it uses as much as digits as its factorization.

22122022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9190815.

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

Adding to 22122022121 its reverse (12122022122), we get a palindrome (34244044243).

Subtracting from 22122022121 its reverse (12122022122), we obtain a palindrome (9999999999).

The spelling of 22122022121 in words is "twenty-two billion, one hundred twenty-two million, twenty-two thousand, one hundred twenty-one".