12122120211111 has 6 divisors (see below), whose sum is σ = 17509729193840. Its totient is φ = 8081413474068.

The previous prime is 12122120211109. The next prime is 12122120211137. The reversal of 12122120211111 is 11111202122121.

It is a happy number.

12122120211111 is a `hidden beast` number, since 121 + 221 + 2 + 0 + 211 + 111 = 666.

12122120211111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12122120211111 - 2¹ = 12122120211109 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 (12122160211111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 673451122831 + ... + 673451122848.

Almost surely, 2^{12122120211111} is an apocalyptic number.

12122120211111 is a deficient number, since it is larger than the sum of its proper divisors (5387608982729).

12122120211111 is a wasteful number, since it uses less digits than its factorization.

12122120211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1346902245685 (or 1346902245682 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12122120211111 its reverse (11111202122121), we get a palindrome (23233322333232).

The spelling of 12122120211111 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty million, two hundred eleven thousand, one hundred eleven".