12112122211 has 8 divisors (see below), whose sum is σ = 13843156064. Its totient is φ = 10381271040.

The previous prime is 12112122203. The next prime is 12112122227. The reversal of 12112122211 is 11222121121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12112122211 - 2³ = 12112122203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12112122611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 155491 + ... + 220003.

It is an arithmetic number, because the mean of its divisors is an integer number (1730394508).

Almost surely, 2^12112122211 is an apocalyptic number.

12112122211 is a deficient number, since it is larger than the sum of its proper divisors (1731033853).

12112122211 is an equidigital number, since it uses as much as digits as its factorization.

12112122211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91341.

The product of its digits is 32, while the sum is 16.

Adding to 12112122211 its reverse (11222121121), we get a palindrome (23334243332).

The spelling of 12112122211 in words is "twelve billion, one hundred twelve million, one hundred twenty-two thousand, two hundred eleven".