212221020211 has 4 divisors (see below), whose sum is σ = 212221941624. Its totient is φ = 212220098800.

The previous prime is 212221020197. The next prime is 212221020251. The reversal of 212221020211 is 112020122212.

It is a happy number.

212221020211 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 212221020211 - 2³⁷ = 74782066739 is a prime.

It is a super-2 number, since 2×212221020211² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212221020251) 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, 222276 + ... + 688366.

It is an arithmetic number, because the mean of its divisors is an integer number (53055485406).

Almost surely, 2^212221020211 is an apocalyptic number.

212221020211 is a deficient number, since it is larger than the sum of its proper divisors (921413).

212221020211 is an equidigital number, since it uses as much as digits as its factorization.

212221020211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921412.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 212221020211 its reverse (112020122212), we get a palindrome (324241142423).

The spelling of 212221020211 in words is "two hundred twelve billion, two hundred twenty-one million, twenty thousand, two hundred eleven".