1123143112 has 96 divisors (see below), whose sum is σ = 2649439800. Its totient is φ = 442423296.

The previous prime is 1123143089. The next prime is 1123143121. The reversal of 1123143112 is 2113413211.

It can be written as a sum of positive squares in 4 ways, for example, as 721781956 + 401361156 = 26866^2 + 20034^2 .

It is a super-2 number, since 2×1123143112² = 2522900900066089088, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123143112.

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, 2206314 + ... + 2206822.

Almost surely, 2^1123143112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1123143112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1324719900).

1123143112 is an abundant number, since it is smaller than the sum of its proper divisors (1526296688).

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

1123143112 is a wasteful number, since it uses less digits than its factorization.

1123143112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975 (or 964 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

The square root of 1123143112 is about 33513.3273788205. The cubic root of 1123143112 is about 1039.4693767502.

Adding to 1123143112 its reverse (2113413211), we get a palindrome (3236556323).

The spelling of 1123143112 in words is "one billion, one hundred twenty-three million, one hundred forty-three thousand, one hundred twelve".