111011100021220 has 48 divisors (see below), whose sum is σ = 278010407017728. Its totient is φ = 36406124726400.

The previous prime is 111011100021203. The next prime is 111011100021247. The reversal of 111011100021220 is 22120001110111.

It is a happy number.

It is a super-2 number, since 2×111011100021220² (a number of 29 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111011100021220.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17237745231 + ... + 17237751670.

It is an arithmetic number, because the mean of its divisors is an integer number (5791883479536).

Almost surely, 2^{111011100021220} is an apocalyptic number.

111011100021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111011100021220 is an abundant number, since it is smaller than the sum of its proper divisors (166999306996508).

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

111011100021220 is a wasteful number, since it uses less digits than its factorization.

111011100021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34475496940 (or 34475496938 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 111011100021220 its reverse (22120001110111), we get a palindrome (133131101131331).

The spelling of 111011100021220 in words is "one hundred eleven trillion, eleven billion, one hundred million, twenty-one thousand, two hundred twenty".