1311230655019 has 2 divisors, whose sum is σ = 1311230655020. Its totient is φ = 1311230655018.

The previous prime is 1311230655013. The next prime is 1311230655071. The reversal of 1311230655019 is 9105560321131.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1311230655019 - 2³ = 1311230655011 is a prime.

It is a super-2 number, since 2×1311230655019² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1311230655011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655615327509 + 655615327510.

It is an arithmetic number, because the mean of its divisors is an integer number (655615327510).

Almost surely, 2^{1311230655019} is an apocalyptic number.

1311230655019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311230655019 is an equidigital number, since it uses as much as digits as its factorization.

1311230655019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24300, while the sum is 37.

The spelling of 1311230655019 in words is "one trillion, three hundred eleven billion, two hundred thirty million, six hundred fifty-five thousand, nineteen".