201200212009 has 2 divisors, whose sum is σ = 201200212010. Its totient is φ = 201200212008.

The previous prime is 201200212001. The next prime is 201200212039. The reversal of 201200212009 is 900212002102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117887162409 + 83313049600 = 343347^2 + 288640^2 .

It is a cyclic number.

It is not a de Polignac number, because 201200212009 - 2³ = 201200212001 is a prime.

It is not a weakly prime, because it can be changed into another prime (201200212001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600106004 + 100600106005.

It is an arithmetic number, because the mean of its divisors is an integer number (100600106005).

Almost surely, 2^201200212009 is an apocalyptic number.

It is an amenable number.

201200212009 is a deficient number, since it is larger than the sum of its proper divisors (1).

201200212009 is an equidigital number, since it uses as much as digits as its factorization.

201200212009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The spelling of 201200212009 in words is "two hundred one billion, two hundred million, two hundred twelve thousand, nine".