111221020111100 has 72 divisors (see below), whose sum is σ = 241597240620288. Its totient is φ = 44442772228800.

The previous prime is 111221020111063. The next prime is 111221020111127. The reversal of 111221020111100 is 1111020122111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1000034495 + ... + 1000145705.

Almost surely, 2^{111221020111100} is an apocalyptic number.

111221020111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221020111100 is an abundant number, since it is smaller than the sum of its proper divisors (130376220509188).

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

111221020111100 is a wasteful number, since it uses less digits than its factorization.

111221020111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121395 (or 121388 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111221020111100 its reverse (1111020122111), we get a palindrome (112332040233211).

The spelling of 111221020111100 in words is "one hundred eleven trillion, two hundred twenty-one billion, twenty million, one hundred eleven thousand, one hundred".