212221101222211 has 16 divisors (see below), whose sum is σ = 217938527571744. Its totient is φ = 206584687643904.

The previous prime is 212221101222199. The next prime is 212221101222239. The reversal of 212221101222211 is 112222101122212.

It is not a de Polignac number, because 212221101222211 - 2⁷ = 212221101222083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221101322211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11524756 + ... + 23606401.

It is an arithmetic number, because the mean of its divisors is an integer number (13621157973234).

Almost surely, 2^{212221101222211} is an apocalyptic number.

212221101222211 is a deficient number, since it is larger than the sum of its proper divisors (5717426349533).

212221101222211 is an equidigital number, since it uses as much as digits as its factorization.

212221101222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35132310.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 212221101222211 its reverse (112222101122212), we get a palindrome (324443202344423).

Subtracting from 212221101222211 its reverse (112222101122212), we obtain a palindrome (99999000099999).

The spelling of 212221101222211 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred one million, two hundred twenty-two thousand, two hundred eleven".