1311450212609 has 2 divisors, whose sum is σ = 1311450212610. Its totient is φ = 1311450212608.

The previous prime is 1311450212563. The next prime is 1311450212627. The reversal of 1311450212609 is 9062120541131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 846731232400 + 464718980209 = 920180^2 + 681703^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311450212609 - 2²⁴ = 1311433435393 is a prime.

It is not a weakly prime, because it can be changed into another prime (1311450212309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655725106304 + 655725106305.

It is an arithmetic number, because the mean of its divisors is an integer number (655725106305).

Almost surely, 2^{1311450212609} is an apocalyptic number.

It is an amenable number.

1311450212609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311450212609 is an equidigital number, since it uses as much as digits as its factorization.

1311450212609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 1311450212609 in words is "one trillion, three hundred eleven billion, four hundred fifty million, two hundred twelve thousand, six hundred nine".