12122112111 has 32 divisors (see below), whose sum is σ = 16680867840. Its totient is φ = 7825593600.

The previous prime is 12122112061. The next prime is 12122112131. The reversal of 12122112111 is 11121122121.

It is a happy number.

It is not a de Polignac number, because 12122112111 - 2⁶ = 12122112047 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122112131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11966041 + ... + 11967053.

It is an arithmetic number, because the mean of its divisors is an integer number (521277120).

Almost surely, 2^12122112111 is an apocalyptic number.

12122112111 is a deficient number, since it is larger than the sum of its proper divisors (4558755729).

12122112111 is a wasteful number, since it uses less digits than its factorization.

12122112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1687.

The product of its digits is 16, while the sum is 15.

Adding to 12122112111 its reverse (11121122121), we get a palindrome (23243234232).

The spelling of 12122112111 in words is "twelve billion, one hundred twenty-two million, one hundred twelve thousand, one hundred eleven".