12122115111 has 12 divisors (see below), whose sum is σ = 17513281240. Its totient is φ = 8079767280.

The previous prime is 12122115059. The next prime is 12122115127. The reversal of 12122115111 is 11151122121.

It is a happy number.

12122115111 is a `hidden beast` number, since 121 + 22 + 11 + 511 + 1 = 666.

It is not a de Polignac number, because 12122115111 - 2²⁹ = 11585244199 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 (12122115911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 89296 + ... + 179493.

Almost surely, 2^12122115111 is an apocalyptic number.

12122115111 is a deficient number, since it is larger than the sum of its proper divisors (5391166129).

12122115111 is a wasteful number, since it uses less digits than its factorization.

12122115111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273806 (or 273803 counting only the distinct ones).

The product of its digits is 40, while the sum is 18.

Adding to 12122115111 its reverse (11151122121), we get a palindrome (23273237232).

The spelling of 12122115111 in words is "twelve billion, one hundred twenty-two million, one hundred fifteen thousand, one hundred eleven".