200212021221991 has 2 divisors, whose sum is σ = 200212021221992. Its totient is φ = 200212021221990.

The previous prime is 200212021221977. The next prime is 200212021222007. The reversal of 200212021221991 is 199122120212002.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 200212021221991 - 2¹¹ = 200212021219943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200212021221941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100106010610995 + 100106010610996.

It is an arithmetic number, because the mean of its divisors is an integer number (100106010610996).

Almost surely, 2^{200212021221991} is an apocalyptic number.

200212021221991 is a deficient number, since it is larger than the sum of its proper divisors (1).

200212021221991 is an equidigital number, since it uses as much as digits as its factorization.

200212021221991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 34.

Adding to 200212021221991 its reverse (199122120212002), we get a palindrome (399334141433993).

The spelling of 200212021221991 in words is "two hundred trillion, two hundred twelve billion, twenty-one million, two hundred twenty-one thousand, nine hundred ninety-one".