111202102221 has 16 divisors (see below), whose sum is σ = 175293955200. Its totient is φ = 61352883648.

The previous prime is 111202102211. The next prime is 111202102241. The reversal of 111202102221 is 122201202111.

It is not a de Polignac number, because 111202102221 - 2²¹ = 111200005069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 111202102221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111202102211) 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, 91298326 + ... + 91299543.

It is an arithmetic number, because the mean of its divisors is an integer number (10955872200).

Almost surely, 2^111202102221 is an apocalyptic number.

It is an amenable number.

111202102221 is a deficient number, since it is larger than the sum of its proper divisors (64091852979).

111202102221 is a wasteful number, since it uses less digits than its factorization.

111202102221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182597908.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 111202102221 its reverse (122201202111), we get a palindrome (233403304332).

The spelling of 111202102221 in words is "one hundred eleven billion, two hundred two million, one hundred two thousand, two hundred twenty-one".