12122212211 has 4 divisors (see below), whose sum is σ = 12760223400. Its totient is φ = 11484201024.

The previous prime is 12122212187. The next prime is 12122212213. The reversal of 12122212211 is 11221222121.

12122212211 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 12122212211 - 2¹⁰ = 12122211187 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 12122212211.

It is not an unprimeable number, because it can be changed into a prime (12122212213) 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 3 ways as a sum of consecutive naturals, for example, 319005566 + ... + 319005603.

It is an arithmetic number, because the mean of its divisors is an integer number (3190055850).

Almost surely, 2^12122212211 is an apocalyptic number.

12122212211 is a deficient number, since it is larger than the sum of its proper divisors (638011189).

12122212211 is an equidigital number, since it uses as much as digits as its factorization.

12122212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 638011188.

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

Adding to 12122212211 its reverse (11221222121), we get a palindrome (23343434332).

The spelling of 12122212211 in words is "twelve billion, one hundred twenty-two million, two hundred twelve thousand, two hundred eleven".