111111111121022 has 16 divisors (see below), whose sum is σ = 168694376129280. Its totient is φ = 54880800931968.

The previous prime is 111111111121007. The next prime is 111111111121057. The reversal of 111111111121022 is 220121111111111.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 286936103 + ... + 287323074.

It is an arithmetic number, because the mean of its divisors is an integer number (10543398508080).

Almost surely, 2^{111111111121022} is an apocalyptic number.

111111111121022 is a deficient number, since it is larger than the sum of its proper divisors (57583265008258).

111111111121022 is a wasteful number, since it uses less digits than its factorization.

111111111121022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574260355.

The product of its (nonzero) digits is 8, while the sum is 17.

Adding to 111111111121022 its reverse (220121111111111), we get a palindrome (331232222232133).

The spelling of 111111111121022 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred eleven million, one hundred twenty-one thousand, twenty-two".