111110212220 has 96 divisors (see below), whose sum is σ = 268684071936. Its totient is φ = 37806912000.

The previous prime is 111110212207. The next prime is 111110212249. The reversal of 111110212220 is 22212011111.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 111110212195 and 111110212204.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32363624 + ... + 32367056.

It is an arithmetic number, because the mean of its divisors is an integer number (2798792416).

Almost surely, 2^111110212220 is an apocalyptic number.

111110212220 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 111110212220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134342035968).

111110212220 is an abundant number, since it is smaller than the sum of its proper divisors (157573859716).

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

111110212220 is a wasteful number, since it uses less digits than its factorization.

111110212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5131 (or 5129 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 111110212220 its reverse (22212011111), we get a palindrome (133322223331).

The spelling of 111110212220 in words is "one hundred eleven billion, one hundred ten million, two hundred twelve thousand, two hundred twenty".