111111122110020 has 48 divisors (see below), whose sum is σ = 311114839499520. Its totient is φ = 29629280411136.

The previous prime is 111111122109971. The next prime is 111111122110039. The reversal of 111111122110020 is 20011221111111.

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

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, 5894725 + ... + 16030284.

It is an arithmetic number, because the mean of its divisors is an integer number (6481559156240).

Almost surely, 2^{111111122110020} is an apocalyptic number.

111111122110020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111122110020 is an abundant number, since it is smaller than the sum of its proper divisors (200003717389500).

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

111111122110020 is a wasteful number, since it uses less digits than its factorization.

111111122110020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22009484 (or 22009482 counting only the distinct ones).

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

Adding to 111111122110020 its reverse (20011221111111), we get a palindrome (131122343221131).

The spelling of 111111122110020 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred twenty-two million, one hundred ten thousand, twenty".