1123112320 has 96 divisors (see below), whose sum is σ = 2951418960. Its totient is φ = 408376320.

The previous prime is 1123112281. The next prime is 1123112323. The reversal of 1123112320 is 232113211.

It is a super-2 number, since 2×1123112320² = 2522762566671564800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 1123112294 and 1123112303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123112323) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70189 + ... + 84691.

Almost surely, 2^1123112320 is an apocalyptic number.

1123112320 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 1123112320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1475709480).

1123112320 is an abundant number, since it is smaller than the sum of its proper divisors (1828306640).

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

1123112320 is a wasteful number, since it uses less digits than its factorization.

1123112320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14544 (or 14521 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1123112320 is about 33512.8679763460. The cubic root of 1123112320 is about 1039.4598773275.

Adding to 1123112320 its reverse (232113211), we get a palindrome (1355225531).

The spelling of 1123112320 in words is "one billion, one hundred twenty-three million, one hundred twelve thousand, three hundred twenty".