1231223312 has 40 divisors (see below), whose sum is σ = 2605249920. Its totient is φ = 559025280.

The previous prime is 1231223251. The next prime is 1231223321. The reversal of 1231223312 is 2133221321.

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 7 ways as a sum of consecutive naturals, for example, 179498 + ... + 186230.

It is an arithmetic number, because the mean of its divisors is an integer number (65131248).

Almost surely, 2^1231223312 is an apocalyptic number.

It is an amenable number.

1231223312 is an abundant number, since it is smaller than the sum of its proper divisors (1374026608).

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

1231223312 is a wasteful number, since it uses less digits than its factorization.

1231223312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7791 (or 7785 counting only the distinct ones).

The product of its digits is 432, while the sum is 20.

The square root of 1231223312 is about 35088.7918287307. The cubic root of 1231223312 is about 1071.7963571368.

Adding to 1231223312 its reverse (2133221321), we get a palindrome (3364444633).

The spelling of 1231223312 in words is "one billion, two hundred thirty-one million, two hundred twenty-three thousand, three hundred twelve".