111221011222100 has 144 divisors (see below), whose sum is σ = 270977592074112. Its totient is φ = 39354375191040.

The previous prime is 111221011222091. The next prime is 111221011222133. The reversal of 111221011222100 is 1222110122111.

It is a super-2 number, since 2×111221011222100² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15807512 + ... + 21732911.

It is an arithmetic number, because the mean of its divisors is an integer number (1881788833848).

Almost surely, 2^{111221011222100} is an apocalyptic number.

111221011222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221011222100 is an abundant number, since it is smaller than the sum of its proper divisors (159756580852012).

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

111221011222100 is a wasteful number, since it uses less digits than its factorization.

111221011222100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37540546 (or 37540539 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111221011222100 its reverse (1222110122111), we get a palindrome (112443121344211).

The spelling of 111221011222100 in words is "one hundred eleven trillion, two hundred twenty-one billion, eleven million, two hundred twenty-two thousand, one hundred".