221200121212211 has 2 divisors, whose sum is σ = 221200121212212. Its totient is φ = 221200121212210.

The previous prime is 221200121212163. The next prime is 221200121212267. The reversal of 221200121212211 is 112212121002122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221200121212211 - 2²² = 221200117017907 is a prime.

It is not a weakly prime, because it can be changed into another prime (221200121292211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600060606105 + 110600060606106.

It is an arithmetic number, because the mean of its divisors is an integer number (110600060606106).

Almost surely, 2^{221200121212211} is an apocalyptic number.

221200121212211 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200121212211 is an equidigital number, since it uses as much as digits as its factorization.

221200121212211 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 20.

Adding to 221200121212211 its reverse (112212121002122), we get a palindrome (333412242214333).

The spelling of 221200121212211 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty-one million, two hundred twelve thousand, two hundred eleven".