1312303111243 has 2 divisors, whose sum is σ = 1312303111244. Its totient is φ = 1312303111242.

The previous prime is 1312303111201. The next prime is 1312303111351. The reversal of 1312303111243 is 3421113032131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1312303111243 - 2²¹ = 1312301014091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1312303112243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656151555621 + 656151555622.

It is an arithmetic number, because the mean of its divisors is an integer number (656151555622).

Almost surely, 2^{1312303111243} is an apocalyptic number.

1312303111243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312303111243 is an equidigital number, since it uses as much as digits as its factorization.

1312303111243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1312303111243 its reverse (3421113032131), we get a palindrome (4733416143374).

The spelling of 1312303111243 in words is "one trillion, three hundred twelve billion, three hundred three million, one hundred eleven thousand, two hundred forty-three".