201211325309 has 2 divisors, whose sum is σ = 201211325310. Its totient is φ = 201211325308.

The previous prime is 201211325297. The next prime is 201211325351. The reversal of 201211325309 is 903523112102.

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., 100947269284 + 100264056025 = 317722^2 + 316645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201211325309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201211325369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100605662654 + 100605662655.

It is an arithmetic number, because the mean of its divisors is an integer number (100605662655).

Almost surely, 2^201211325309 is an apocalyptic number.

It is an amenable number.

201211325309 is a deficient number, since it is larger than the sum of its proper divisors (1).

201211325309 is an equidigital number, since it uses as much as digits as its factorization.

201211325309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The spelling of 201211325309 in words is "two hundred one billion, two hundred eleven million, three hundred twenty-five thousand, three hundred nine".