1201122019609 has 2 divisors, whose sum is σ = 1201122019610. Its totient is φ = 1201122019608.

The previous prime is 1201122019607. The next prime is 1201122019627. The reversal of 1201122019609 is 9069102211021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1200661488009 + 460531600 = 1095747^2 + 21460^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201122019609 - 2¹ = 1201122019607 is a prime.

Together with 1201122019607, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1201122019607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600561009804 + 600561009805.

It is an arithmetic number, because the mean of its divisors is an integer number (600561009805).

Almost surely, 2^{1201122019609} is an apocalyptic number.

It is an amenable number.

1201122019609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201122019609 is an equidigital number, since it uses as much as digits as its factorization.

1201122019609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 34.

The spelling of 1201122019609 in words is "one trillion, two hundred one billion, one hundred twenty-two million, nineteen thousand, six hundred nine".