1320131312 has 20 divisors (see below), whose sum is σ = 2559099600. Its totient is φ = 659718528.

The previous prime is 1320131291. The next prime is 1320131321. The reversal of 1320131312 is 2131310231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11189 + ... + 52587.

It is an arithmetic number, because the mean of its divisors is an integer number (127954980).

Almost surely, 2^1320131312 is an apocalyptic number.

It is an amenable number.

1320131312 is a deficient number, since it is larger than the sum of its proper divisors (1238968288).

1320131312 is a wasteful number, since it uses less digits than its factorization.

1320131312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43400 (or 43394 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1320131312 is about 36333.6113261536. The cubic root of 1320131312 is about 1096.9976840743.

Adding to 1320131312 its reverse (2131310231), we get a palindrome (3451441543).

The spelling of 1320131312 in words is "one billion, three hundred twenty million, one hundred thirty-one thousand, three hundred twelve".