222212122211 has 4 divisors (see below), whose sum is σ = 222279319992. Its totient is φ = 222144924432.

The previous prime is 222212122199. The next prime is 222212122243. The reversal of 222212122211 is 112221212222.

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 222212122211 - 2²⁶ = 222145013347 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222212182211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33593930 + ... + 33600543.

It is an arithmetic number, because the mean of its divisors is an integer number (55569829998).

Almost surely, 2^222212122211 is an apocalyptic number.

222212122211 is a deficient number, since it is larger than the sum of its proper divisors (67197781).

222212122211 is an equidigital number, since it uses as much as digits as its factorization.

222212122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67197780.

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

Adding to 222212122211 its reverse (112221212222), we get a palindrome (334433334433).

It can be divided in two parts, 22221212221 and 1, that added together give a palindrome (22221212222).

The spelling of 222212122211 in words is "two hundred twenty-two billion, two hundred twelve million, one hundred twenty-two thousand, two hundred eleven".