221211200020211 has 2 divisors, whose sum is σ = 221211200020212. Its totient is φ = 221211200020210.

The previous prime is 221211200020207. The next prime is 221211200020247. The reversal of 221211200020211 is 112020002112122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221211200020211 - 2² = 221211200020207 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221211200020211.

It is not a weakly prime, because it can be changed into another prime (221211200020711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605600010105 + 110605600010106.

It is an arithmetic number, because the mean of its divisors is an integer number (110605600010106).

Almost surely, 2^{221211200020211} is an apocalyptic number.

221211200020211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211200020211 is an equidigital number, since it uses as much as digits as its factorization.

221211200020211 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 221211200020211 its reverse (112020002112122), we get a palindrome (333231202132333).

The spelling of 221211200020211 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred million, twenty thousand, two hundred eleven".