22112212222121 has 8 divisors (see below), whose sum is σ = 25273216108224. Its totient is φ = 18951737442480.

The previous prime is 22112212222021. The next prime is 22112212222129. The reversal of 22112212222121 is 12122221221122.

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-22112212222121 is a prime.

It is a super-2 number, since 2×22112212222121² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22112212222129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132187055 + ... + 132354228.

It is an arithmetic number, because the mean of its divisors is an integer number (3159152013528).

Almost surely, 2^{22112212222121} is an apocalyptic number.

It is an amenable number.

22112212222121 is a deficient number, since it is larger than the sum of its proper divisors (3161003886103).

22112212222121 is a wasteful number, since it uses less digits than its factorization.

22112212222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264553231.

The product of its digits is 512, while the sum is 23.

Adding to 22112212222121 its reverse (12122221221122), we get a palindrome (34234433443243).

The spelling of 22112212222121 in words is "twenty-two trillion, one hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred twenty-one".