111111102212100 has 72 divisors (see below), whose sum is σ = 321687667129920. Its totient is φ = 29610621598080.

The previous prime is 111111102212081. The next prime is 111111102212177. The reversal of 111111102212100 is 1212201111111.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 111111102212100.

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 23 ways as a sum of consecutive naturals, for example, 118316887 + ... + 119252286.

Almost surely, 2^{111111102212100} is an apocalyptic number.

111111102212100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111102212100 is an abundant number, since it is smaller than the sum of its proper divisors (210576564917820).

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

111111102212100 is a wasteful number, since it uses less digits than its factorization.

111111102212100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237570749 (or 237570742 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 111111102212100 its reverse (1212201111111), we get a palindrome (112323303323211).

The spelling of 111111102212100 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred two million, two hundred twelve thousand, one hundred".