1200645224209 has 2 divisors, whose sum is σ = 1200645224210. Its totient is φ = 1200645224208.

The previous prime is 1200645224171. The next prime is 1200645224267. The reversal of 1200645224209 is 9024225460021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200236375809 + 408848400 = 1095553^2 + 20220^2 .

It is an emirp because it is prime and its reverse (9024225460021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1200645224209 - 2³³ = 1192055289617 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200645224809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600322612104 + 600322612105.

It is an arithmetic number, because the mean of its divisors is an integer number (600322612105).

Almost surely, 2^{1200645224209} is an apocalyptic number.

It is an amenable number.

1200645224209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200645224209 is an equidigital number, since it uses as much as digits as its factorization.

1200645224209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

The spelling of 1200645224209 in words is "one trillion, two hundred billion, six hundred forty-five million, two hundred twenty-four thousand, two hundred nine".