22222120011121 has 4 divisors (see below), whose sum is σ = 22224677520100. Its totient is φ = 22219562502144.

The previous prime is 22222120011061. The next prime is 22222120011127. The reversal of 22222120011121 is 12111002122222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13843526634721 + 8378593376400 = 3720689^2 + 2894580^2 .

It is a cyclic number.

It is not a de Polignac number, because 22222120011121 - 2¹⁵ = 22222119978353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22222120011127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1278741456 + ... + 1278758833.

It is an arithmetic number, because the mean of its divisors is an integer number (5556169380025).

Almost surely, 2^{22222120011121} is an apocalyptic number.

It is an amenable number.

22222120011121 is a deficient number, since it is larger than the sum of its proper divisors (2557508979).

22222120011121 is an equidigital number, since it uses as much as digits as its factorization.

22222120011121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2557508978.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 22222120011121 its reverse (12111002122222), we get a palindrome (34333122133343).

The spelling of 22222120011121 in words is "twenty-two trillion, two hundred twenty-two billion, one hundred twenty million, eleven thousand, one hundred twenty-one".