201221100222211 has 2 divisors, whose sum is σ = 201221100222212. Its totient is φ = 201221100222210.

The previous prime is 201221100222209. The next prime is 201221100222257. The reversal of 201221100222211 is 112222001122102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201221100222211 - 2¹ = 201221100222209 is a prime.

Together with 201221100222209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (201221100220211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100610550111105 + 100610550111106.

It is an arithmetic number, because the mean of its divisors is an integer number (100610550111106).

Almost surely, 2^{201221100222211} is an apocalyptic number.

201221100222211 is a deficient number, since it is larger than the sum of its proper divisors (1).

201221100222211 is an equidigital number, since it uses as much as digits as its factorization.

201221100222211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 201221100222211 its reverse (112222001122102), we get a palindrome (313443101344313).

The spelling of 201221100222211 in words is "two hundred one trillion, two hundred twenty-one billion, one hundred million, two hundred twenty-two thousand, two hundred eleven".