1113312220 has 48 divisors (see below), whose sum is σ = 2501402400. Its totient is φ = 414961920.

The previous prime is 1113312199. The next prime is 1113312229. The reversal of 1113312220 is 222133111.

It is a junction number, because it is equal to n+sod(n) for n = 1113312194 and 1113312203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113312229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 835 + ... + 47194.

It is an arithmetic number, because the mean of its divisors is an integer number (52112550).

Almost surely, 2^1113312220 is an apocalyptic number.

1113312220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1113312220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1250701200).

1113312220 is an abundant number, since it is smaller than the sum of its proper divisors (1388090180).

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

1113312220 is a wasteful number, since it uses less digits than its factorization.

1113312220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48118 (or 48116 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1113312220 is about 33366.3336313716. Note that the first 3 decimals coincide. The cubic root of 1113312220 is about 1036.4276532314.

Adding to 1113312220 its reverse (222133111), we get a palindrome (1335445331).

The spelling of 1113312220 in words is "one billion, one hundred thirteen million, three hundred twelve thousand, two hundred twenty".