12222222211 has 4 divisors (see below), whose sum is σ = 12334352800. Its totient is φ = 12110091624.

The previous prime is 12222222197. The next prime is 12222222253. The reversal of 12222222211 is 11222222221.

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 12222222211 - 2⁹ = 12222221699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12222222281) 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, 56065131 + ... + 56065348.

It is an arithmetic number, because the mean of its divisors is an integer number (3083588200).

Almost surely, 2^12222222211 is an apocalyptic number.

12222222211 is a deficient number, since it is larger than the sum of its proper divisors (112130589).

12222222211 is a wasteful number, since it uses less digits than its factorization.

12222222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112130588.

The product of its digits is 256, while the sum is 19.

Adding to 12222222211 its reverse (11222222221), we get a palindrome (23444444432).

The spelling of 12222222211 in words is "twelve billion, two hundred twenty-two million, two hundred twenty-two thousand, two hundred eleven".