212210221211 has 16 divisors (see below), whose sum is σ = 222199228416. Its totient is φ = 202285597536.

The previous prime is 212210221187. The next prime is 212210221253. The reversal of 212210221211 is 112122012212.

It is a cyclic number.

It is not a de Polignac number, because 212210221211 - 2⁶ = 212210221147 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 212210221211.

It is not an unprimeable number, because it can be changed into a prime (212210221711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12199226 + ... + 12216608.

It is an arithmetic number, because the mean of its divisors is an integer number (13887451776).

Almost surely, 2^212210221211 is an apocalyptic number.

212210221211 is a deficient number, since it is larger than the sum of its proper divisors (9989007205).

212210221211 is a wasteful number, since it uses less digits than its factorization.

212210221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19202.

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

Adding to 212210221211 its reverse (112122012212), we get a palindrome (324332233423).

The spelling of 212210221211 in words is "two hundred twelve billion, two hundred ten million, two hundred twenty-one thousand, two hundred eleven".