1113021120 has 56 divisors (see below), whose sum is σ = 3533845104. Its totient is φ = 296805376.

The previous prime is 1113021113. The next prime is 1113021139. The reversal of 1113021120 is 211203111.

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 = 1113021096 and 1113021105.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 578739 + ... + 580658.

Almost surely, 2^1113021120 is an apocalyptic number.

1113021120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1113021120 is an abundant number, since it is smaller than the sum of its proper divisors (2420823984).

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

1113021120 is a wasteful number, since it uses less digits than its factorization.

1113021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1159417 (or 1159407 counting only the distinct ones).

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

The square root of 1113021120 is about 33361.9711647858. The cubic root of 1113021120 is about 1036.3373130783.

Adding to 1113021120 its reverse (211203111), we get a palindrome (1324224231).

The spelling of 1113021120 in words is "one billion, one hundred thirteen million, twenty-one thousand, one hundred twenty".