209969234201 has 2 divisors, whose sum is σ = 209969234202. Its totient is φ = 209969234200.

The previous prime is 209969234171. The next prime is 209969234203. The reversal of 209969234201 is 102432969902.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209969234176 + 25 = 458224^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-209969234201 is a prime.

Together with 209969234203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (209969234203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104984617100 + 104984617101.

It is an arithmetic number, because the mean of its divisors is an integer number (104984617101).

Almost surely, 2^209969234201 is an apocalyptic number.

It is an amenable number.

209969234201 is a deficient number, since it is larger than the sum of its proper divisors (1).

209969234201 is an equidigital number, since it uses as much as digits as its factorization.

209969234201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 47.

The spelling of 209969234201 in words is "two hundred nine billion, nine hundred sixty-nine million, two hundred thirty-four thousand, two hundred one".