1311341321 has 4 divisors (see below), whose sum is σ = 1311418644. Its totient is φ = 1311264000.

The previous prime is 1311341293. The next prime is 1311341327. The reversal of 1311341321 is 1231431131.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 876160000 + 435181321 = 29600^2 + 20861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311341321 - 2¹⁰ = 1311340297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1311341293 and 1311341302.

It is not an unprimeable number, because it can be changed into a prime (1311341327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 980 + ... + 51221.

It is an arithmetic number, because the mean of its divisors is an integer number (327854661).

Almost surely, 2^1311341321 is an apocalyptic number.

It is an amenable number.

1311341321 is a deficient number, since it is larger than the sum of its proper divisors (77323).

1311341321 is an equidigital number, since it uses as much as digits as its factorization.

1311341321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77322.

The product of its digits is 216, while the sum is 20.

The square root of 1311341321 is about 36212.4470451805. The cubic root of 1311341321 is about 1094.5575023790.

Adding to 1311341321 its reverse (1231431131), we get a palindrome (2542772452).

The spelling of 1311341321 in words is "one billion, three hundred eleven million, three hundred forty-one thousand, three hundred twenty-one".