22111222222121 has 32 divisors (see below), whose sum is σ = 23612664741120. Its totient is φ = 20632882636800.

The previous prime is 22111222222013. The next prime is 22111222222129. The reversal of 22111222222121 is 12122222211122.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22111222222121 is a prime.

It is a super-2 number, since 2×22111222222121² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22111222222129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1447914716 + ... + 1447929986.

It is an arithmetic number, because the mean of its divisors is an integer number (737895773160).

Almost surely, 2^{22111222222121} is an apocalyptic number.

It is an amenable number.

22111222222121 is a deficient number, since it is larger than the sum of its proper divisors (1501442518999).

22111222222121 is a wasteful number, since it uses less digits than its factorization.

22111222222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16865.

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

Adding to 22111222222121 its reverse (12122222211122), we get a palindrome (34233444433243).

The spelling of 22111222222121 in words is "twenty-two trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-one".