1123124220 has 72 divisors (see below), whose sum is σ = 3479321664. Its totient is φ = 293125248.

The previous prime is 1123124207. The next prime is 1123124237. The reversal of 1123124220 is 224213211.

It is a happy number.

1123124220 is a `hidden beast` number, since 11 + 231 + 2 + 422 + 0 = 666.

It is a super-2 number, since 2×1123124220² = 2522816027101216800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1123124193 and 1123124202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 57919 + ... + 74838.

It is an arithmetic number, because the mean of its divisors is an integer number (48323912).

Almost surely, 2^1123124220 is an apocalyptic number.

1123124220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123124220 is an abundant number, since it is smaller than the sum of its proper divisors (2356197444).

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

1123124220 is a wasteful number, since it uses less digits than its factorization.

1123124220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132819 (or 132814 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1123124220 is about 33513.0455196182. The cubic root of 1123124220 is about 1039.4635485331.

Adding to 1123124220 its reverse (224213211), we get a palindrome (1347337431).

The spelling of 1123124220 in words is "one billion, one hundred twenty-three million, one hundred twenty-four thousand, two hundred twenty".