111110122221 has 64 divisors (see below), whose sum is σ = 179707379712. Its totient is φ = 59719680000.

The previous prime is 111110122213. The next prime is 111110122241. The reversal of 111110122221 is 122221011111.

It is a happy number.

It is not a de Polignac number, because 111110122221 - 2³ = 111110122213 is a prime.

111110122221 is a modest number, since divided by 122221 gives 111110 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 111110122221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111110122241) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7225581 + ... + 7240941.

It is an arithmetic number, because the mean of its divisors is an integer number (2807927808).

Almost surely, 2^111110122221 is an apocalyptic number.

It is an amenable number.

111110122221 is a deficient number, since it is larger than the sum of its proper divisors (68597257491).

111110122221 is a wasteful number, since it uses less digits than its factorization.

111110122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15714.

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

Adding to 111110122221 its reverse (122221011111), we get a palindrome (233331133332).

The spelling of 111110122221 in words is "one hundred eleven billion, one hundred ten million, one hundred twenty-two thousand, two hundred twenty-one".