1201210112209 has 2 divisors, whose sum is σ = 1201210112210. Its totient is φ = 1201210112208.

The previous prime is 1201210112203. The next prime is 1201210112243. The reversal of 1201210112209 is 9022110121021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 873514544400 + 327695567809 = 934620^2 + 572447^2 .

It is a cyclic number.

It is not a de Polignac number, because 1201210112209 - 2⁵ = 1201210112177 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1201210112209.

It is not a weakly prime, because it can be changed into another prime (1201210112203) 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, 600605056104 + 600605056105.

It is an arithmetic number, because the mean of its divisors is an integer number (600605056105).

Almost surely, 2^{1201210112209} is an apocalyptic number.

It is an amenable number.

1201210112209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1201210112209 is an equidigital number, since it uses as much as digits as its factorization.

1201210112209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 22.

The spelling of 1201210112209 in words is "one trillion, two hundred one billion, two hundred ten million, one hundred twelve thousand, two hundred nine".