212222221211 has 64 divisors (see below), whose sum is σ = 293642496000. Its totient is φ = 151132464000.

The previous prime is 212222221187. The next prime is 212222221219. The reversal of 212222221211 is 112122222212.

It is not a de Polignac number, because 212222221211 - 2⁶ = 212222221147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212222221219) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4932530 + ... + 4975368.

It is an arithmetic number, because the mean of its divisors is an integer number (4588164000).

Almost surely, 2^212222221211 is an apocalyptic number.

212222221211 is a deficient number, since it is larger than the sum of its proper divisors (81420274789).

212222221211 is a wasteful number, since it uses less digits than its factorization.

212222221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42985 (or 42971 counting only the distinct ones).

The product of its digits is 256, while the sum is 20.

Adding to 212222221211 its reverse (112122222212), we get a palindrome (324344443423).

It can be divided in two parts, 2122222212 and 11, that multiplied together give a palindrome (23344444332).

The spelling of 212222221211 in words is "two hundred twelve billion, two hundred twenty-two million, two hundred twenty-one thousand, two hundred eleven".