1311321322 has 4 divisors (see below), whose sum is σ = 1966981986. Its totient is φ = 655660660.

The previous prime is 1311321311. The next prime is 1311321337. The reversal of 1311321322 is 2231231131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2231231131 = 601 ⋅3712531.

It can be written as a sum of positive squares in only one way, i.e., 1126877761 + 184443561 = 33569^2 + 13581^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1311321322.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327830329 + ... + 327830332.

Almost surely, 2^1311321322 is an apocalyptic number.

1311321322 is a deficient number, since it is larger than the sum of its proper divisors (655660664).

1311321322 is an equidigital number, since it uses as much as digits as its factorization.

1311321322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 655660663.

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

The square root of 1311321322 is about 36212.1709097922. The cubic root of 1311321322 is about 1094.5519380594.

Adding to 1311321322 its reverse (2231231131), we get a palindrome (3542552453).

The spelling of 1311321322 in words is "one billion, three hundred eleven million, three hundred twenty-one thousand, three hundred twenty-two".