1205312699713 has 2 divisors, whose sum is σ = 1205312699714. Its totient is φ = 1205312699712.

The previous prime is 1205312699711. The next prime is 1205312699741. The reversal of 1205312699713 is 3179962135021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1172613934129 + 32698765584 = 1082873^2 + 180828^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205312699713 - 2¹ = 1205312699711 is a prime.

Together with 1205312699711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1205312699711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602656349856 + 602656349857.

It is an arithmetic number, because the mean of its divisors is an integer number (602656349857).

Almost surely, 2^{1205312699713} is an apocalyptic number.

It is an amenable number.

1205312699713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205312699713 is an equidigital number, since it uses as much as digits as its factorization.

1205312699713 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 49.

The spelling of 1205312699713 in words is "one trillion, two hundred five billion, three hundred twelve million, six hundred ninety-nine thousand, seven hundred thirteen".