1201122122209 has 2 divisors, whose sum is σ = 1201122122210. Its totient is φ = 1201122122208.

The previous prime is 1201122122141. The next prime is 1201122122297. The reversal of 1201122122209 is 9022212211021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1148534459809 + 52587662400 = 1071697^2 + 229320^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201122122209 - 2⁹ = 1201122121697 is a prime.

It is not a weakly prime, because it can be changed into another prime (1201122125209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600561061104 + 600561061105.

It is an arithmetic number, because the mean of its divisors is an integer number (600561061105).

Almost surely, 2^{1201122122209} is an apocalyptic number.

It is an amenable number.

1201122122209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201122122209 is an equidigital number, since it uses as much as digits as its factorization.

1201122122209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 25.

The spelling of 1201122122209 in words is "one trillion, two hundred one billion, one hundred twenty-two million, one hundred twenty-two thousand, two hundred nine".