1311244323013 has 2 divisors, whose sum is σ = 1311244323014. Its totient is φ = 1311244323012.

The previous prime is 1311244322963. The next prime is 1311244323031. The reversal of 1311244323013 is 3103234421131.

Together with next prime (1311244323031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 878152661604 + 433091661409 = 937098^2 + 658097^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1311244323013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311274323013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655622161506 + 655622161507.

It is an arithmetic number, because the mean of its divisors is an integer number (655622161507).

Almost surely, 2^{1311244323013} is an apocalyptic number.

It is an amenable number.

1311244323013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311244323013 is an equidigital number, since it uses as much as digits as its factorization.

1311244323013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 1311244323013 its reverse (3103234421131), we get a palindrome (4414478744144).

The spelling of 1311244323013 in words is "one trillion, three hundred eleven billion, two hundred forty-four million, three hundred twenty-three thousand, thirteen".