212122222211 has 4 divisors (see below), whose sum is σ = 212155702152. Its totient is φ = 212088742272.

The previous prime is 212122222183. The next prime is 212122222231. The reversal of 212122222211 is 112222221212.

212122222211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 212122222211 - 2³⁰ = 211048480387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212122222231) 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 3 ways as a sum of consecutive naturals, for example, 16730465 + ... + 16743138.

It is an arithmetic number, because the mean of its divisors is an integer number (53038925538).

Almost surely, 2^212122222211 is an apocalyptic number.

212122222211 is a deficient number, since it is larger than the sum of its proper divisors (33479941).

212122222211 is an equidigital number, since it uses as much as digits as its factorization.

212122222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33479940.

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

Adding to 212122222211 its reverse (112222221212), we get a palindrome (324344443423).

Subtracting from 212122222211 its reverse (112222221212), we obtain a palindrome (99900000999).

The spelling of 212122222211 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".