1113031020 has 192 divisors, whose sum is σ = 3432844800. Its totient is φ = 268369920.

The previous prime is 1113030979. The next prime is 1113031033. The reversal of 1113031020 is 201303111.

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 = 1113030987 and 1113031005.

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 63 ways as a sum of consecutive naturals, for example, 4330732 + ... + 4330988.

It is an arithmetic number, because the mean of its divisors is an integer number (17879400).

Almost surely, 2^1113031020 is an apocalyptic number.

1113031020 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 1113031020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1716422400).

1113031020 is an abundant number, since it is smaller than the sum of its proper divisors (2319813780).

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

1113031020 is a wasteful number, since it uses less digits than its factorization.

1113031020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 1113031020 is about 33362.1195369839. The cubic root of 1113031020 is about 1036.3403857091.

Adding to 1113031020 its reverse (201303111), we get a palindrome (1314334131).

The spelling of 1113031020 in words is "one billion, one hundred thirteen million, thirty-one thousand, twenty".