12112222011 has 32 divisors (see below), whose sum is σ = 17343786240. Its totient is φ = 7496146944.

The previous prime is 12112222007. The next prime is 12112222019. The reversal of 12112222011 is 11022221121.

It is not a de Polignac number, because 12112222011 - 2² = 12112222007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12112222019) 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, 728851 + ... + 745283.

It is an arithmetic number, because the mean of its divisors is an integer number (541993320).

Almost surely, 2^12112222011 is an apocalyptic number.

12112222011 is a deficient number, since it is larger than the sum of its proper divisors (5231564229).

12112222011 is a wasteful number, since it uses less digits than its factorization.

12112222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16715.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12112222011 its reverse (11022221121), we get a palindrome (23134443132).

It can be divided in two parts, 1211 and 2222011, that added together give a palindrome (2223222).

The spelling of 12112222011 in words is "twelve billion, one hundred twelve million, two hundred twenty-two thousand, eleven".