12211210211 has 4 divisors (see below), whose sum is σ = 12929516712. Its totient is φ = 11492903712.

The previous prime is 12211210183. The next prime is 12211210241. The reversal of 12211210211 is 11201211221.

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 12211210211 - 2¹⁸ = 12210948067 is a prime.

It is a super-2 number, since 2×12211210211² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12211210241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359153225 + ... + 359153258.

It is an arithmetic number, because the mean of its divisors is an integer number (3232379178).

Almost surely, 2^12211210211 is an apocalyptic number.

12211210211 is a deficient number, since it is larger than the sum of its proper divisors (718306501).

12211210211 is an equidigital number, since it uses as much as digits as its factorization.

12211210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718306500.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 12211210211 its reverse (11201211221), we get a palindrome (23412421432).

The spelling of 12211210211 in words is "twelve billion, two hundred eleven million, two hundred ten thousand, two hundred eleven".