1245345221089 has 2 divisors, whose sum is σ = 1245345221090. Its totient is φ = 1245345221088.

The previous prime is 1245345221017. The next prime is 1245345221093. The reversal of 1245345221089 is 9801225435421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 807508918225 + 437836302864 = 898615^2 + 661692^2 .

It is a cyclic number.

It is not a de Polignac number, because 1245345221089 - 2⁹ = 1245345220577 is a prime.

It is not a weakly prime, because it can be changed into another prime (1245345261089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622672610544 + 622672610545.

It is an arithmetic number, because the mean of its divisors is an integer number (622672610545).

Almost surely, 2^{1245345221089} is an apocalyptic number.

It is an amenable number.

1245345221089 is a deficient number, since it is larger than the sum of its proper divisors (1).

1245345221089 is an equidigital number, since it uses as much as digits as its factorization.

1245345221089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 691200, while the sum is 46.

The spelling of 1245345221089 in words is "one trillion, two hundred forty-five billion, three hundred forty-five million, two hundred twenty-one thousand, eighty-nine".