212221121110211 has 4 divisors (see below), whose sum is σ = 214168103872800. Its totient is φ = 210274138347624.

The previous prime is 212221121110169. The next prime is 212221121110241. The reversal of 212221121110211 is 112011121122212.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212221121110211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221121110241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 973491381131 + ... + 973491381348.

It is an arithmetic number, because the mean of its divisors is an integer number (53542025968200).

Almost surely, 2^{212221121110211} is an apocalyptic number.

212221121110211 is a deficient number, since it is larger than the sum of its proper divisors (1946982762589).

212221121110211 is a wasteful number, since it uses less digits than its factorization.

212221121110211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1946982762588.

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 212221121110211 its reverse (112011121122212), we get a palindrome (324232242232423).

The spelling of 212221121110211 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred twenty-one million, one hundred ten thousand, two hundred eleven".