111111112220 has 12 divisors (see below), whose sum is σ = 233333335704. Its totient is φ = 44444444880.

The previous prime is 111111112153. The next prime is 111111112261. The reversal of 111111112220 is 22211111111.

It is a junction number, because it is equal to n+sod(n) for n = 111111112195 and 111111112204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2777777786 + ... + 2777777825.

It is an arithmetic number, because the mean of its divisors is an integer number (19444444642).

Almost surely, 2^111111112220 is an apocalyptic number.

111111112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

111111112220 is an abundant number, since it is smaller than the sum of its proper divisors (122222223484).

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

111111112220 is a wasteful number, since it uses less digits than its factorization.

111111112220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555555620 (or 5555555618 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 111111112220 its reverse (22211111111), we get a palindrome (133322223331).

The spelling of 111111112220 in words is "one hundred eleven billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty".