12022222121 has 24 divisors (see below), whose sum is σ = 14893974720. Its totient is φ = 9501800256.

The previous prime is 12022222111. The next prime is 12022222181. The reversal of 12022222121 is 12122222021.

It is a happy number.

It is not a de Polignac number, because 12022222121 - 2⁶ = 12022222057 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 12022222121.

It is not an unprimeable number, because it can be changed into a prime (12022222111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1200491 + ... + 1210463.

It is an arithmetic number, because the mean of its divisors is an integer number (620582280).

Almost surely, 2^12022222121 is an apocalyptic number.

It is an amenable number.

12022222121 is a deficient number, since it is larger than the sum of its proper divisors (2871752599).

12022222121 is a wasteful number, since it uses less digits than its factorization.

12022222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11025 (or 11012 counting only the distinct ones).

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

Adding to 12022222121 its reverse (12122222021), we get a palindrome (24144444142).

The spelling of 12022222121 in words is "twelve billion, twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".