1123137120 has 384 divisors, whose sum is σ = 4332303360. Its totient is φ = 238878720.

The previous prime is 1123137107. The next prime is 1123137179. The reversal of 1123137120 is 217313211.

It is a happy number.

It is a super-2 number, since 2×1123137120² = 2522873980643788800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4660200 + ... + 4660440.

It is an arithmetic number, because the mean of its divisors is an integer number (11282040).

Almost surely, 2^1123137120 is an apocalyptic number.

1123137120 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 1123137120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2166151680).

1123137120 is an abundant number, since it is smaller than the sum of its proper divisors (3209166240).

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

1123137120 is a wasteful number, since it uses less digits than its factorization.

1123137120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 358 (or 350 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1123137120 is about 33513.2379814306. The cubic root of 1123137120 is about 1039.4675282141.

The spelling of 1123137120 in words is "one billion, one hundred twenty-three million, one hundred thirty-seven thousand, one hundred twenty".