22121123211 has 12 divisors (see below), whose sum is σ = 34857527640. Its totient is φ = 13406741280.

The previous prime is 22121123207. The next prime is 22121123257. The reversal of 22121123211 is 11232112122.

22121123211 is a `hidden beast` number, since 221 + 211 + 23 + 211 = 666.

It is not a de Polignac number, because 22121123211 - 2² = 22121123207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22121123201) 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, 111722746 + ... + 111722943.

It is an arithmetic number, because the mean of its divisors is an integer number (2904793970).

Almost surely, 2^22121123211 is an apocalyptic number.

22121123211 is a deficient number, since it is larger than the sum of its proper divisors (12736404429).

22121123211 is a wasteful number, since it uses less digits than its factorization.

22121123211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223445706 (or 223445703 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

Adding to 22121123211 its reverse (11232112122), we get a palindrome (33353235333).

The spelling of 22121123211 in words is "twenty-two billion, one hundred twenty-one million, one hundred twenty-three thousand, two hundred eleven".