212112220211 has 4 divisors (see below), whose sum is σ = 215278074312. Its totient is φ = 208946366112.

The previous prime is 212112220207. The next prime is 212112220217. The reversal of 212112220211 is 112022211212.

212112220211 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 212112220211 - 2² = 212112220207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212112220211.

It is not an unprimeable number, because it can be changed into a prime (212112220217) 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, 1582926950 + ... + 1582927083.

It is an arithmetic number, because the mean of its divisors is an integer number (53819518578).

Almost surely, 2^212112220211 is an apocalyptic number.

212112220211 is a deficient number, since it is larger than the sum of its proper divisors (3165854101).

212112220211 is an equidigital number, since it uses as much as digits as its factorization.

212112220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3165854100.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212112220211 its reverse (112022211212), we get a palindrome (324134431423).

It can be divided in two parts, 21211 and 2220211, that added together give a palindrome (2241422).

The spelling of 212112220211 in words is "two hundred twelve billion, one hundred twelve million, two hundred twenty thousand, two hundred eleven".