12122312111 has 16 divisors (see below), whose sum is σ = 15797404224. Its totient is φ = 9027085824.

The previous prime is 12122312089. The next prime is 12122312117. The reversal of 12122312111 is 11121322121.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12122312111 - 2²⁶ = 12055203247 is a prime.

It is a super-3 number, since 3×12122312111³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 12122312111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122312117) 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, 3916460 + ... + 3919553.

It is an arithmetic number, because the mean of its divisors is an integer number (987337764).

Almost surely, 2^12122312111 is an apocalyptic number.

12122312111 is a deficient number, since it is larger than the sum of its proper divisors (3675092113).

12122312111 is a wasteful number, since it uses less digits than its factorization.

12122312111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7836050.

The product of its digits is 48, while the sum is 17.

Adding to 12122312111 its reverse (11121322121), we get a palindrome (23243634232).

The spelling of 12122312111 in words is "twelve billion, one hundred twenty-two million, three hundred twelve thousand, one hundred eleven".