1123313112 has 96 divisors (see below), whose sum is σ = 3101885280. Its totient is φ = 367180800.

The previous prime is 1123313099. The next prime is 1123313129. The reversal of 1123313112 is 2113133211.

It is a super-2 number, since 2×1123313112² = 2523664695182249088, which contains 22 as substring.

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

It is a nude number because it is divisible by every one of its digits.

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, 821053 + ... + 822419.

It is an arithmetic number, because the mean of its divisors is an integer number (32311305).

Almost surely, 2^1123313112 is an apocalyptic number.

1123313112 is a gapful number since it is divisible by the number (12) 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 1123313112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550942640).

1123313112 is an abundant number, since it is smaller than the sum of its proper divisors (1978572168).

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

1123313112 is a wasteful number, since it uses less digits than its factorization.

1123313112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593 (or 1586 counting only the distinct ones).

The product of its digits is 108, while the sum is 18.

The square root of 1123313112 is about 33515.8635872627. The cubic root of 1123313112 is about 1039.5218191259.

Adding to 1123313112 its reverse (2113133211), we get a palindrome (3236446323).

The spelling of 1123313112 in words is "one billion, one hundred twenty-three million, three hundred thirteen thousand, one hundred twelve".