201003111209 has 2 divisors, whose sum is σ = 201003111210. Its totient is φ = 201003111208.

The previous prime is 201003111149. The next prime is 201003111217. The reversal of 201003111209 is 902111300102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151908960025 + 49094151184 = 389755^2 + 221572^2 .

It is a cyclic number.

It is not a de Polignac number, because 201003111209 - 2¹² = 201003107113 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 (201003111809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100501555604 + 100501555605.

It is an arithmetic number, because the mean of its divisors is an integer number (100501555605).

Almost surely, 2^201003111209 is an apocalyptic number.

It is an amenable number.

201003111209 is a deficient number, since it is larger than the sum of its proper divisors (1).

201003111209 is an equidigital number, since it uses as much as digits as its factorization.

201003111209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 20.

The spelling of 201003111209 in words is "two hundred one billion, three million, one hundred eleven thousand, two hundred nine".