1111313220 has 48 divisors (see below), whose sum is σ = 3120405120. Its totient is φ = 295518976.

The previous prime is 1111313213. The next prime is 1111313221. The reversal of 1111313220 is 223131111.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1111313220.

It is not an unprimeable number, because it can be changed into a prime (1111313221) 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, 4257 + ... + 47336.

It is an arithmetic number, because the mean of its divisors is an integer number (65008440).

Almost surely, 2^1111313220 is an apocalyptic number.

1111313220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1111313220 is an abundant number, since it is smaller than the sum of its proper divisors (2009091900).

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

1111313220 is a wasteful number, since it uses less digits than its factorization.

1111313220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51964 (or 51962 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1111313220 is about 33336.3648288172. The cubic root of 1111313220 is about 1035.8069647749.

Adding to 1111313220 its reverse (223131111), we get a palindrome (1334444331).

The spelling of 1111313220 in words is "one billion, one hundred eleven million, three hundred thirteen thousand, two hundred twenty".