12112221122 has 16 divisors (see below), whose sum is σ = 18814601592. Its totient is φ = 5844433920.

The previous prime is 12112221119. The next prime is 12112221127. The reversal of 12112221122 is 22112221121.

It can be written as a sum of positive squares in 4 ways, for example, as 4112528641 + 7999692481 = 64129^2 + 89441^2 .

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 12112221122.

It is not an unprimeable number, because it can be changed into a prime (12112221127) 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, 930143 + ... + 943074.

Almost surely, 2^12112221122 is an apocalyptic number.

12112221122 is a deficient number, since it is larger than the sum of its proper divisors (6702380470).

12112221122 is a wasteful number, since it uses less digits than its factorization.

12112221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1873333.

The product of its digits is 64, while the sum is 17.

Adding to 12112221122 its reverse (22112221121), we get a palindrome (34224442243).

Subtracting 12112221122 from its reverse (22112221121), we obtain a palindrome (9999999999).

The spelling of 12112221122 in words is "twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-two".