201221212207 has 2 divisors, whose sum is σ = 201221212208. Its totient is φ = 201221212206.

The previous prime is 201221212193. The next prime is 201221212237. The reversal of 201221212207 is 702212122102.

201221212207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201221212207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201221212237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610606103 + 100610606104.

It is an arithmetic number, because the mean of its divisors is an integer number (100610606104).

Almost surely, 2^201221212207 is an apocalyptic number.

201221212207 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221212207 is an equidigital number, since it uses as much as digits as its factorization.

201221212207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 201221212207 its reverse (702212122102), we get a palindrome (903433334309).

The spelling of 201221212207 in words is "two hundred one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred seven".