200012012021221 has 2 divisors, whose sum is σ = 200012012021222. Its totient is φ = 200012012021220.

The previous prime is 200012012021207. The next prime is 200012012021267. The reversal of 200012012021221 is 122120210210002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199876286093121 + 135725928100 = 14137761^2 + 368410^2 .

It is a cyclic number.

It is not a de Polignac number, because 200012012021221 - 2¹³ = 200012012013029 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 200012012021195 and 200012012021204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200012012021281) 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, 100006006010610 + 100006006010611.

It is an arithmetic number, because the mean of its divisors is an integer number (100006006010611).

Almost surely, 2^{200012012021221} is an apocalyptic number.

It is an amenable number.

200012012021221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200012012021221 is an equidigital number, since it uses as much as digits as its factorization.

200012012021221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 200012012021221 its reverse (122120210210002), we get a palindrome (322132222231223).

The spelling of 200012012021221 in words is "two hundred trillion, twelve billion, twelve million, twenty-one thousand, two hundred twenty-one".