111010021218 has 48 divisors (see below), whose sum is σ = 244035417600. Its totient is φ = 36464575680.

The previous prime is 111010021217. The next prime is 111010021261. The reversal of 111010021218 is 812120010111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 111010021218.

It is not an unprimeable number, because it can be changed into a prime (111010021217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 665943 + ... + 815781.

It is an arithmetic number, because the mean of its divisors is an integer number (5084071200).

Almost surely, 2^111010021218 is an apocalyptic number.

111010021218 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

111010021218 is an abundant number, since it is smaller than the sum of its proper divisors (133025396382).

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

111010021218 is a wasteful number, since it uses less digits than its factorization.

111010021218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150447 (or 150444 counting only the distinct ones).

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

Adding to 111010021218 its reverse (812120010111), we get a palindrome (923130031329).

The spelling of 111010021218 in words is "one hundred eleven billion, ten million, twenty-one thousand, two hundred eighteen".