201211212211 has 4 divisors (see below), whose sum is σ = 204621571800. Its totient is φ = 197800852624.

The previous prime is 201211212197. The next prime is 201211212247. The reversal of 201211212211 is 112212112102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201211212211 - 2¹⁷ = 201211081139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211212511) 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 in 3 ways as a sum of consecutive naturals, for example, 1705179706 + ... + 1705179823.

It is an arithmetic number, because the mean of its divisors is an integer number (51155392950).

Almost surely, 2^201211212211 is an apocalyptic number.

201211212211 is a deficient number, since it is larger than the sum of its proper divisors (3410359589).

201211212211 is an equidigital number, since it uses as much as digits as its factorization.

201211212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3410359588.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201211212211 its reverse (112212112102), we get a palindrome (313423324313).

The spelling of 201211212211 in words is "two hundred one billion, two hundred eleven million, two hundred twelve thousand, two hundred eleven".