12222122211 has 64 divisors (see below), whose sum is σ = 19774487040. Its totient is φ = 7415971200.

The previous prime is 12222122207. The next prime is 12222122221. The reversal of 12222122211 is 11222122221.

It is a happy number.

It is not a de Polignac number, because 12222122211 - 2² = 12222122207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12222122201) 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 63 ways as a sum of consecutive naturals, for example, 10882896 + ... + 10884018.

It is an arithmetic number, because the mean of its divisors is an integer number (308976360).

Almost surely, 2^12222122211 is an apocalyptic number.

12222122211 is a deficient number, since it is larger than the sum of its proper divisors (7552364829).

12222122211 is a wasteful number, since it uses less digits than its factorization.

12222122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553 (or 1547 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

Adding to 12222122211 its reverse (11222122221), we get a palindrome (23444244432).

The spelling of 12222122211 in words is "twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred eleven".