111112100220 has 144 divisors (see below), whose sum is σ = 342955821600. Its totient is φ = 26858472960.

The previous prime is 111112100189. The next prime is 111112100243. The reversal of 111112100220 is 22001211111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 111112100196 and 111112100205.

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, 2511814 + ... + 2555666.

It is an arithmetic number, because the mean of its divisors is an integer number (2381637650).

Almost surely, 2^111112100220 is an apocalyptic number.

111112100220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111112100220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171477910800).

111112100220 is an abundant number, since it is smaller than the sum of its proper divisors (231843721380).

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

111112100220 is a wasteful number, since it uses less digits than its factorization.

111112100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44236 (or 44223 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 111112100220 its reverse (22001211111), we get a palindrome (133113311331).

The spelling of 111112100220 in words is "one hundred eleven billion, one hundred twelve million, one hundred thousand, two hundred twenty".