12001222211111 has 16 divisors (see below), whose sum is σ = 14935407475200. Its totient is φ = 9409306703328.

The previous prime is 12001222211093. The next prime is 12001222211119. The reversal of 12001222211111 is 11111222210021.

It is not a de Polignac number, because 12001222211111 - 2²⁶ = 12001155102247 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 12001222211111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001222211119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1555767755 + ... + 1555775468.

It is an arithmetic number, because the mean of its divisors is an integer number (933462967200).

Almost surely, 2^{12001222211111} is an apocalyptic number.

12001222211111 is a deficient number, since it is larger than the sum of its proper divisors (2934185264089).

12001222211111 is a wasteful number, since it uses less digits than its factorization.

12001222211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3111543278.

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

Adding to 12001222211111 its reverse (11111222210021), we get a palindrome (23112444421132).

The spelling of 12001222211111 in words is "twelve trillion, one billion, two hundred twenty-two million, two hundred eleven thousand, one hundred eleven".