12112112221212 has 48 divisors (see below), whose sum is σ = 28367516906624. Its totient is φ = 4022256744000.

The previous prime is 12112112221133. The next prime is 12112112221289. The reversal of 12112112221212 is 21212221121121.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4381287 + ... + 6589377.

Almost surely, 2^{12112112221212} is an apocalyptic number.

12112112221212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12112112221212 is an abundant number, since it is smaller than the sum of its proper divisors (16255404685412).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12112112221212 is a wasteful number, since it uses less digits than its factorization.

12112112221212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209810 (or 2209808 counting only the distinct ones).

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

Adding to 12112112221212 its reverse (21212221121121), we get a palindrome (33324333342333).

The spelling of 12112112221212 in words is "twelve trillion, one hundred twelve billion, one hundred twelve million, two hundred twenty-one thousand, two hundred twelve".