22111121211 has 8 divisors (see below), whose sum is σ = 29497603584. Its totient is φ = 14732693160.

The previous prime is 22111121171. The next prime is 22111121239. The reversal of 22111121211 is 11212111122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22111121211 - 2⁷ = 22111121083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22111121261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2007171 + ... + 2018156.

It is an arithmetic number, because the mean of its divisors is an integer number (3687200448).

Almost surely, 2^22111121211 is an apocalyptic number.

22111121211 is a deficient number, since it is larger than the sum of its proper divisors (7386482373).

22111121211 is a wasteful number, since it uses less digits than its factorization.

22111121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027161.

The product of its digits is 16, while the sum is 15.

Adding to 22111121211 its reverse (11212111122), we get a palindrome (33323232333).

The spelling of 22111121211 in words is "twenty-two billion, one hundred eleven million, one hundred twenty-one thousand, two hundred eleven".