12112222122111 has 32 divisors (see below), whose sum is σ = 16266530304000. Its totient is φ = 8016584083200.

The previous prime is 12112222122107. The next prime is 12112222122127. The reversal of 12112222122111 is 11122122221121.

It is not a de Polignac number, because 12112222122111 - 2² = 12112222122107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112222122911) 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, 1223328261 + ... + 1223338161.

It is an arithmetic number, because the mean of its divisors is an integer number (508329072000).

Almost surely, 2^{12112222122111} is an apocalyptic number.

12112222122111 is a deficient number, since it is larger than the sum of its proper divisors (4154308181889).

12112222122111 is a wasteful number, since it uses less digits than its factorization.

12112222122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15159.

The product of its digits is 128, while the sum is 21.

Adding to 12112222122111 its reverse (11122122221121), we get a palindrome (23234344343232).

It can be divided in two parts, 1211222 and 2122111, that added together give a palindrome (3333333).

The spelling of 12112222122111 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-two million, one hundred twenty-two thousand, one hundred eleven".