111102221121 has 16 divisors (see below), whose sum is σ = 152861053248. Its totient is φ = 71724744000.

The previous prime is 111102221093. The next prime is 111102221129. The reversal of 111102221121 is 121122201111.

It is a happy number.

It is not a de Polignac number, because 111102221121 - 2⁹ = 111102220609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111102221121.

It is not an unprimeable number, because it can be changed into a prime (111102221129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2348430 + ... + 2395271.

It is an arithmetic number, because the mean of its divisors is an integer number (9553815828).

Almost surely, 2^111102221121 is an apocalyptic number.

It is an amenable number.

111102221121 is a deficient number, since it is larger than the sum of its proper divisors (41758832127).

111102221121 is a wasteful number, since it uses less digits than its factorization.

111102221121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743952.

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

Adding to 111102221121 its reverse (121122201111), we get a palindrome (232224422232).

The spelling of 111102221121 in words is "one hundred eleven billion, one hundred two million, two hundred twenty-one thousand, one hundred twenty-one".