12210211 has 4 divisors (see below), whose sum is σ = 13149472. Its totient is φ = 11270952.

The previous prime is 12210203. The next prime is 12210221. The reversal of 12210211 is 11201221.

12210211 is digitally balanced in base 3, 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 an emirpimes, since its reverse is a distinct semiprime: 11201221 = 29 ⋅386249.

It is a cyclic number.

It is not a de Polignac number, because 12210211 - 2³ = 12210203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12210221) 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, 469611 + ... + 469636.

It is an arithmetic number, because the mean of its divisors is an integer number (3287368).

Almost surely, 2^12210211 is an apocalyptic number.

12210211 is a deficient number, since it is larger than the sum of its proper divisors (939261).

12210211 is an equidigital number, since it uses as much as digits as its factorization.

12210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939260.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 12210211 is about 3494.3112339916. The cubic root of 12210211 is about 230.2719593333.

Adding to 12210211 its reverse (11201221), we get a palindrome (23411432).

It can be divided in two parts, 12210 and 211, that added together give a palindrome (12421).

The spelling of 12210211 in words is "twelve million, two hundred ten thousand, two hundred eleven".