12122111211 has 32 divisors (see below), whose sum is σ = 18856232448. Its totient is φ = 6783955200.

The previous prime is 12122111179. The next prime is 12122111219. The reversal of 12122111211 is 11211122121.

It is a happy number.

It is not a de Polignac number, because 12122111211 - 2⁵ = 12122111179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12122111219) 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, 218511 + ... + 268311.

It is an arithmetic number, because the mean of its divisors is an integer number (589257264).

Almost surely, 2^12122111211 is an apocalyptic number.

12122111211 is a deficient number, since it is larger than the sum of its proper divisors (6734121237).

12122111211 is a wasteful number, since it uses less digits than its factorization.

12122111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50051.

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

Adding to 12122111211 its reverse (11211122121), we get a palindrome (23333233332).

The spelling of 12122111211 in words is "twelve billion, one hundred twenty-two million, one hundred eleven thousand, two hundred eleven".