1111112220 has 48 divisors (see below), whose sum is σ = 3195204768. Its totient is φ = 288288000.

The previous prime is 1111112203. The next prime is 1111112227. The reversal of 1111112220 is 222111111.

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 = 1111112196 and 1111112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111112227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248031 + ... + 252470.

It is an arithmetic number, because the mean of its divisors is an integer number (66566766).

Almost surely, 2^1111112220 is an apocalyptic number.

1111112220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111112220 is an abundant number, since it is smaller than the sum of its proper divisors (2084092548).

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

1111112220 is a wasteful number, since it uses less digits than its factorization.

1111112220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500550 (or 500548 counting only the distinct ones).

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

The square root of 1111112220 is about 33333.3499666625. The cubic root of 1111112220 is about 1035.7445132087.

Adding to 1111112220 its reverse (222111111), we get a palindrome (1333223331).

The spelling of 1111112220 in words is "one billion, one hundred eleven million, one hundred twelve thousand, two hundred twenty".