1111103220 has 48 divisors (see below), whose sum is σ = 3113909568. Its totient is φ = 296025600.

The previous prime is 1111103197. The next prime is 1111103237. The reversal of 1111103220 is 223011111.

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 = 1111103196 and 1111103205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63420 + ... + 79020.

It is an arithmetic number, because the mean of its divisors is an integer number (64873116).

Almost surely, 2^1111103220 is an apocalyptic number.

1111103220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111103220 is an abundant number, since it is smaller than the sum of its proper divisors (2002806348).

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

1111103220 is a wasteful number, since it uses less digits than its factorization.

1111103220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16800 (or 16798 counting only the distinct ones).

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

The square root of 1111103220 is about 33333.2149664565. The cubic root of 1111103220 is about 1035.7417166938.

Adding to 1111103220 its reverse (223011111), we get a palindrome (1334114331).

The spelling of 1111103220 in words is "one billion, one hundred eleven million, one hundred three thousand, two hundred twenty".