1123032120 has 64 divisors (see below), whose sum is σ = 3850398720. Its totient is φ = 256692864.

The previous prime is 1123032101. The next prime is 1123032139. The reversal of 1123032120 is 212303211.

It is an interprime number because it is at equal distance from previous prime (1123032101) and next prime (1123032139).

It is a super-2 number, since 2×1123032120² = 2522402285103388800, which contains 22 as substring.

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 1123032120.

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, 667632 + ... + 669311.

It is an arithmetic number, because the mean of its divisors is an integer number (60162480).

Almost surely, 2^1123032120 is an apocalyptic number.

1123032120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123032120 is an abundant number, since it is smaller than the sum of its proper divisors (2727366600).

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

1123032120 is a wasteful number, since it uses less digits than its factorization.

1123032120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336964 (or 1336960 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1123032120 is about 33511.6713996781. The cubic root of 1123032120 is about 1039.4351345761.

Adding to 1123032120 its reverse (212303211), we get a palindrome (1335335331).

The spelling of 1123032120 in words is "one billion, one hundred twenty-three million, thirty-two thousand, one hundred twenty".