12222111212111 has 16 divisors (see below), whose sum is σ = 12805783651584. Its totient is φ = 11642859036864.

The previous prime is 12222111212071. The next prime is 12222111212303. The reversal of 12222111212111 is 11121211122221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12222111212111 - 2⁴² = 7824064701007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12222111212911) 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, 7698320 + ... + 9149226.

It is an arithmetic number, because the mean of its divisors is an integer number (800361478224).

Almost surely, 2^{12222111212111} is an apocalyptic number.

12222111212111 is a deficient number, since it is larger than the sum of its proper divisors (583672439473).

12222111212111 is a wasteful number, since it uses less digits than its factorization.

12222111212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452430.

The product of its digits is 64, while the sum is 20.

Adding to 12222111212111 its reverse (11121211122221), we get a palindrome (23343322334332).

The spelling of 12222111212111 in words is "twelve trillion, two hundred twenty-two billion, one hundred eleven million, two hundred twelve thousand, one hundred eleven".