222121211211 has 24 divisors (see below), whose sum is σ = 322820918784. Its totient is φ = 147167665200.

The previous prime is 222121211153. The next prime is 222121211239. The reversal of 222121211211 is 112112121222.

222121211211 is a `hidden beast` number, since 2 + 221 + 21 + 211 + 211 = 666.

It is not a de Polignac number, because 222121211211 - 2¹⁹ = 222120686923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (222121211261) 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 23 ways as a sum of consecutive naturals, for example, 11941060 + ... + 11959646.

It is an arithmetic number, because the mean of its divisors is an integer number (13450871616).

Almost surely, 2^222121211211 is an apocalyptic number.

222121211211 is a deficient number, since it is larger than the sum of its proper divisors (100699707573).

222121211211 is a wasteful number, since it uses less digits than its factorization.

222121211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26711 (or 26708 counting only the distinct ones).

The product of its digits is 64, while the sum is 18.

Adding to 222121211211 its reverse (112112121222), we get a palindrome (334233332433).

The spelling of 222121211211 in words is "two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eleven".