111111221112220 has 96 divisors (see below), whose sum is σ = 267319579968000. Its totient is φ = 38002107813120.

The previous prime is 111111221112217. The next prime is 111111221112247. The reversal of 111111221112220 is 22211122111111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158021830 + ... + 158723410.

It is an arithmetic number, because the mean of its divisors is an integer number (2784578958000).

Almost surely, 2^{111111221112220} is an apocalyptic number.

111111221112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111221112220 is an abundant number, since it is smaller than the sum of its proper divisors (156208358855780).

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

111111221112220 is a wasteful number, since it uses less digits than its factorization.

111111221112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704363 (or 704361 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 19.

Adding to 111111221112220 its reverse (22211122111111), we get a palindrome (133322343223331).

The spelling of 111111221112220 in words is "one hundred eleven trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twenty".