211222101210111 has 24 divisors (see below), whose sum is σ = 321174510150000. Its totient is φ = 133395914316672.

The previous prime is 211222101210089. The next prime is 211222101210163. The reversal of 211222101210111 is 111012101222112.

It is a happy number.

211222101210111 is a `hidden beast` number, since 21 + 1 + 222 + 101 + 210 + 111 = 666.

It is not a de Polignac number, because 211222101210111 - 2⁵ = 211222101210079 is a prime.

It is a super-2 number, since 2×211222101210111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211222101230111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31761726 + ... + 37831883.

It is an arithmetic number, because the mean of its divisors is an integer number (13382271256250).

Almost surely, 2^{211222101210111} is an apocalyptic number.

211222101210111 is a deficient number, since it is larger than the sum of its proper divisors (109952408939889).

211222101210111 is a wasteful number, since it uses less digits than its factorization.

211222101210111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69611383 (or 69611380 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211222101210111 its reverse (111012101222112), we get a palindrome (322234202432223).

The spelling of 211222101210111 in words is "two hundred eleven trillion, two hundred twenty-two billion, one hundred one million, two hundred ten thousand, one hundred eleven".