201201312209 has 2 divisors, whose sum is σ = 201201312210. Its totient is φ = 201201312208.

The previous prime is 201201312163. The next prime is 201201312223. The reversal of 201201312209 is 902213102102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189817062400 + 11384249809 = 435680^2 + 106697^2 .

It is a cyclic number.

It is not a de Polignac number, because 201201312209 - 2⁸ = 201201311953 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (201201311209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600656104 + 100600656105.

It is an arithmetic number, because the mean of its divisors is an integer number (100600656105).

Almost surely, 2^201201312209 is an apocalyptic number.

It is an amenable number.

201201312209 is a deficient number, since it is larger than the sum of its proper divisors (1).

201201312209 is an equidigital number, since it uses as much as digits as its factorization.

201201312209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 201201312209 in words is "two hundred one billion, two hundred one million, three hundred twelve thousand, two hundred nine".