111221010222100 has 18 divisors (see below), whose sum is σ = 241349592182174. Its totient is φ = 44488404088800.

The previous prime is 111221010222019. The next prime is 111221010222173. The reversal of 111221010222100 is 1222010122111.

It can be written as a sum of positive squares in 3 ways, for example, as 26014855426576 + 85206154795524 = 5100476^2 + 9230718^2 .

It is a super-2 number, since 2×111221010222100² (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 5 ways as a sum of consecutive naturals, for example, 556105051011 + ... + 556105051210.

Almost surely, 2^{111221010222100} is an apocalyptic number.

111221010222100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111221010222100 is an abundant number, since it is smaller than the sum of its proper divisors (130128581960074).

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

111221010222100 is a wasteful number, since it uses less digits than its factorization.

111221010222100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112210102235 (or 1112210102228 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 111221010222100 its reverse (1222010122111), we get a palindrome (112443020344211).

The spelling of 111221010222100 in words is "one hundred eleven trillion, two hundred twenty-one billion, ten million, two hundred twenty-two thousand, one hundred".