1123000120 has 64 divisors (see below), whose sum is σ = 2777639040. Its totient is φ = 405225600.

The previous prime is 1123000117. The next prime is 1123000133. The reversal of 1123000120 is 210003211.

It is a super-2 number, since 2×1123000120² = 2522258539040028800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 1123000097 and 1123000106.

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, 47899 + ... + 67381.

It is an arithmetic number, because the mean of its divisors is an integer number (43400610).

Almost surely, 2^1123000120 is an apocalyptic number.

1123000120 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 1123000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1388819520).

1123000120 is an abundant number, since it is smaller than the sum of its proper divisors (1654638920).

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

1123000120 is a wasteful number, since it uses less digits than its factorization.

1123000120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19636 (or 19632 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1123000120 is about 33511.1939506786. The cubic root of 1123000120 is about 1039.4252618279.

Adding to 1123000120 its reverse (210003211), we get a palindrome (1333003331).

The spelling of 1123000120 in words is "one billion, one hundred twenty-three million, one hundred twenty", and thus it is an aban number.