1311322312 has 16 divisors (see below), whose sum is σ = 2488353840. Its totient is φ = 647761296.

The previous prime is 1311322283. The next prime is 1311322321. The reversal of 1311322312 is 2132231131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311322312.

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, 986778 + ... + 988105.

It is an arithmetic number, because the mean of its divisors is an integer number (155522115).

Almost surely, 2^1311322312 is an apocalyptic number.

It is an amenable number.

1311322312 is a deficient number, since it is larger than the sum of its proper divisors (1177031528).

1311322312 is a wasteful number, since it uses less digits than its factorization.

1311322312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1974972 (or 1974968 counting only the distinct ones).

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

The square root of 1311322312 is about 36212.1845792269. The cubic root of 1311322312 is about 1094.5522135083.

Adding to 1311322312 its reverse (2132231131), we get a palindrome (3443553443).

The spelling of 1311322312 in words is "one billion, three hundred eleven million, three hundred twenty-two thousand, three hundred twelve".