12112221112 has 8 divisors (see below), whose sum is σ = 22710414600. Its totient is φ = 6056110552.

The previous prime is 12112221091. The next prime is 12112221119. The reversal of 12112221112 is 21112221121.

It is a tau number, because it is divible by the number of its divisors (8).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112221119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 757013812 + ... + 757013827.

It is an arithmetic number, because the mean of its divisors is an integer number (2838801825).

Almost surely, 2^12112221112 is an apocalyptic number.

It is an amenable number.

12112221112 is a deficient number, since it is larger than the sum of its proper divisors (10598193488).

12112221112 is a wasteful number, since it uses less digits than its factorization.

12112221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514027645 (or 1514027641 counting only the distinct ones).

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

Adding to 12112221112 its reverse (21112221121), we get a palindrome (33224442233).

Subtracting 12112221112 from its reverse (21112221121), we obtain a palindrome (9000000009).

The spelling of 12112221112 in words is "twelve billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twelve".