1311334303243 has 2 divisors, whose sum is σ = 1311334303244. Its totient is φ = 1311334303242.

The previous prime is 1311334303231. The next prime is 1311334303247. The reversal of 1311334303243 is 3423034331131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311334303243 - 2²¹ = 1311332206091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311334303247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655667151621 + 655667151622.

It is an arithmetic number, because the mean of its divisors is an integer number (655667151622).

Almost surely, 2^{1311334303243} is an apocalyptic number.

1311334303243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311334303243 is an equidigital number, since it uses as much as digits as its factorization.

1311334303243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 31.

Adding to 1311334303243 its reverse (3423034331131), we get a palindrome (4734368634374).

The spelling of 1311334303243 in words is "one trillion, three hundred eleven billion, three hundred thirty-four million, three hundred three thousand, two hundred forty-three".