111990841218 has 40 divisors (see below), whose sum is σ = 252242730828. Its totient is φ = 37136848896.

The previous prime is 111990841201. The next prime is 111990841229. The reversal of 111990841218 is 812148099111.

It can be written as a sum of positive squares in 2 ways, for example, as 106045968609 + 5944872609 = 325647^2 + 77103^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1759671 + ... + 1822202.

Almost surely, 2^111990841218 is an apocalyptic number.

111990841218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

111990841218 is an abundant number, since it is smaller than the sum of its proper divisors (140251889610).

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

111990841218 is a wasteful number, since it uses less digits than its factorization.

111990841218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3582080 (or 3582071 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 45.

The spelling of 111990841218 in words is "one hundred eleven billion, nine hundred ninety million, eight hundred forty-one thousand, two hundred eighteen".