12111220012211 has 4 divisors (see below), whose sum is σ = 12121562643624. Its totient is φ = 12100877380800.

The previous prime is 12111220012187. The next prime is 12111220012219. The reversal of 12111220012211 is 11221002211121.

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 12111220012211 - 2¹⁸ = 12111219750067 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 12111220012211.

It is not an unprimeable number, because it can be changed into a prime (12111220012219) 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, 5171313950 + ... + 5171316291.

It is an arithmetic number, because the mean of its divisors is an integer number (3030390660906).

Almost surely, 2^{12111220012211} is an apocalyptic number.

12111220012211 is a deficient number, since it is larger than the sum of its proper divisors (10342631413).

12111220012211 is a wasteful number, since it uses less digits than its factorization.

12111220012211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10342631412.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12111220012211 its reverse (11221002211121), we get a palindrome (23332222223332).

The spelling of 12111220012211 in words is "twelve trillion, one hundred eleven billion, two hundred twenty million, twelve thousand, two hundred eleven".