200201212101221 has 2 divisors, whose sum is σ = 200201212101222. Its totient is φ = 200201212101220.

The previous prime is 200201212101217. The next prime is 200201212101251. The reversal of 200201212101221 is 122101212102002.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154815457860196 + 45385754241025 = 12442486^2 + 6736895^2 .

It is a cyclic number.

It is not a de Polignac number, because 200201212101221 - 2² = 200201212101217 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 200201212101221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (200201212101251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100100606050610 + 100100606050611.

It is an arithmetic number, because the mean of its divisors is an integer number (100100606050611).

Almost surely, 2^{200201212101221} is an apocalyptic number.

It is an amenable number.

200201212101221 is a deficient number, since it is larger than the sum of its proper divisors (1).

200201212101221 is an equidigital number, since it uses as much as digits as its factorization.

200201212101221 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 17.

Adding to 200201212101221 its reverse (122101212102002), we get a palindrome (322302424203223).

The spelling of 200201212101221 in words is "two hundred trillion, two hundred one billion, two hundred twelve million, one hundred one thousand, two hundred twenty-one".