1311342321 has 8 divisors (see below), whose sum is σ = 1766482144. Its totient is φ = 865215360.

The previous prime is 1311342317. The next prime is 1311342341. The reversal of 1311342321 is 1232431131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1311342321 - 2² = 1311342317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311342301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2252875 + ... + 2253456.

It is an arithmetic number, because the mean of its divisors is an integer number (220810268).

Almost surely, 2^1311342321 is an apocalyptic number.

It is an amenable number.

1311342321 is a deficient number, since it is larger than the sum of its proper divisors (455139823).

1311342321 is an equidigital number, since it uses as much as digits as its factorization.

1311342321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4506431.

The product of its digits is 432, while the sum is 21.

The square root of 1311342321 is about 36212.4608525850. The cubic root of 1311342321 is about 1094.5577806074.

Adding to 1311342321 its reverse (1232431131), we get a palindrome (2543773452).

The spelling of 1311342321 in words is "one billion, three hundred eleven million, three hundred forty-two thousand, three hundred twenty-one".