1321330312 has 32 divisors (see below), whose sum is σ = 2614291200. Its totient is φ = 624832384.

The previous prime is 1321330279. The next prime is 1321330337. The reversal of 1321330312 is 2130331231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321330312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23968 + ... + 56719.

It is an arithmetic number, because the mean of its divisors is an integer number (81696600).

Almost surely, 2^1321330312 is an apocalyptic number.

It is an amenable number.

1321330312 is a deficient number, since it is larger than the sum of its proper divisors (1292960888).

1321330312 is a wasteful number, since it uses less digits than its factorization.

1321330312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80805 (or 80801 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 1321330312 is about 36350.1074551369. The cubic root of 1321330312 is about 1097.3296970611.

Adding to 1321330312 its reverse (2130331231), we get a palindrome (3451661543).

The spelling of 1321330312 in words is "one billion, three hundred twenty-one million, three hundred thirty thousand, three hundred twelve".