22122122121 has 12 divisors (see below), whose sum is σ = 34859101680. Its totient is φ = 13407346680.

The previous prime is 22122122111. The next prime is 22122122153. The reversal of 22122122121 is 12122122122.

It is a happy number.

22122122121 is a `hidden beast` number, since 221 + 221 + 221 + 2 + 1 = 666.

It is not a de Polignac number, because 22122122121 - 2¹⁴ = 22122105737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22122122094 and 22122122103.

It is not an unprimeable number, because it can be changed into a prime (22122122111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 111727791 + ... + 111727988.

It is an arithmetic number, because the mean of its divisors is an integer number (2904925140).

Almost surely, 2^22122122121 is an apocalyptic number.

It is an amenable number.

22122122121 is a deficient number, since it is larger than the sum of its proper divisors (12736979559).

22122122121 is a wasteful number, since it uses less digits than its factorization.

22122122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223455796 (or 223455793 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 22122122121 its reverse (12122122122), we get a palindrome (34244244243).

Subtracting from 22122122121 its reverse (12122122122), we obtain a palindrome (9999999999).

It can be divided in two parts, 22122122 and 121, that multiplied together give a palindrome (2676776762).

The spelling of 22122122121 in words is "twenty-two billion, one hundred twenty-two million, one hundred twenty-two thousand, one hundred twenty-one".