221111118 has 12 divisors (see below), whose sum is σ = 479074128. Its totient is φ = 73703700.

The previous prime is 221111063. The next prime is 221111123. The reversal of 221111118 is 811111122.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 12283951 = 221111118 / (2 + 2 + 1 + 1 + 1 + 1 + 1 + 1 + 8).

It is a self number, because there is not a number n which added to its sum of digits gives 221111118.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6141958 + ... + 6141993.

It is an arithmetic number, because the mean of its divisors is an integer number (39922844).

Almost surely, 2^221111118 is an apocalyptic number.

221111118 is an abundant number, since it is smaller than the sum of its proper divisors (257963010).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221111118 is a wasteful number, since it uses less digits than its factorization.

221111118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12283959 (or 12283956 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

The square root of 221111118 is about 14869.8055804372. The cubic root of 221111118 is about 604.6956719085.

The spelling of 221111118 in words is "two hundred twenty-one million, one hundred eleven thousand, one hundred eighteen".