1201851048389 has 2 divisors, whose sum is σ = 1201851048390. Its totient is φ = 1201851048388.

The previous prime is 1201851048319. The next prime is 1201851048397. The reversal of 1201851048389 is 9838401581021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1036442091364 + 165408957025 = 1018058^2 + 406705^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201851048389 - 2³⁶ = 1133131571653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1201851048319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600925524194 + 600925524195.

It is an arithmetic number, because the mean of its divisors is an integer number (600925524195).

Almost surely, 2^{1201851048389} is an apocalyptic number.

It is an amenable number.

1201851048389 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201851048389 is an equidigital number, since it uses as much as digits as its factorization.

1201851048389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 552960, while the sum is 50.

The spelling of 1201851048389 in words is "one trillion, two hundred one billion, eight hundred fifty-one million, forty-eight thousand, three hundred eighty-nine".