1323131312 has 10 divisors (see below), whose sum is σ = 2563566948. Its totient is φ = 661565648.

The previous prime is 1323131279. The next prime is 1323131317. The reversal of 1323131312 is 2131313231.

It is not an unprimeable number, because it can be changed into a prime (1323131317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41347838 + ... + 41347869.

Almost surely, 2^1323131312 is an apocalyptic number.

It is an amenable number.

1323131312 is a deficient number, since it is larger than the sum of its proper divisors (1240435636).

1323131312 is an equidigital number, since it uses as much as digits as its factorization.

1323131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82695715 (or 82695709 counting only the distinct ones).

The product of its digits is 324, while the sum is 20.

The square root of 1323131312 is about 36374.8719860290. The cubic root of 1323131312 is about 1097.8280315900.

Adding to 1323131312 its reverse (2131313231), we get a palindrome (3454444543).

The spelling of 1323131312 in words is "one billion, three hundred twenty-three million, one hundred thirty-one thousand, three hundred twelve".