1123231312 has 120 divisors (see below), whose sum is σ = 2664579456. Its totient is φ = 456470784.

The previous prime is 1123231297. The next prime is 1123231331. The reversal of 1123231312 is 2131323211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123231312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3011158 + ... + 3011530.

Almost surely, 2^1123231312 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 1123231312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332289728).

1123231312 is an abundant number, since it is smaller than the sum of its proper divisors (1541348144).

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

1123231312 is a wasteful number, since it uses less digits than its factorization.

1123231312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585 (or 572 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1123231312 is about 33514.6432473926. The cubic root of 1123231312 is about 1039.4965857491.

Adding to 1123231312 its reverse (2131323211), we get a palindrome (3254554523).

The spelling of 1123231312 in words is "one billion, one hundred twenty-three million, two hundred thirty-one thousand, three hundred twelve".