1133111220 has 48 divisors (see below), whose sum is σ = 3212885760. Its totient is φ = 298336896.

The previous prime is 1133111191. The next prime is 1133111237. The reversal of 1133111220 is 221113311.

It is a happy number.

1133111220 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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 1133111220.

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, 114787 + ... + 124266.

It is an arithmetic number, because the mean of its divisors is an integer number (66935120).

Almost surely, 2^1133111220 is an apocalyptic number.

1133111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1133111220 is an abundant number, since it is smaller than the sum of its proper divisors (2079774540).

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

1133111220 is a wasteful number, since it uses less digits than its factorization.

1133111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239144 (or 239142 counting only the distinct ones).

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

The square root of 1133111220 is about 33661.7174249919. The cubic root of 1133111220 is about 1042.5354863732.

Adding to 1133111220 its reverse (221113311), we get a palindrome (1354224531).

The spelling of 1133111220 in words is "one billion, one hundred thirty-three million, one hundred eleven thousand, two hundred twenty".