12112221212238 has 128 divisors (see below), whose sum is σ = 29687316480000. Its totient is φ = 3219986689920.

The previous prime is 12112221212237. The next prime is 12112221212239. The reversal of 12112221212238 is 83221212221121.

It is an interprime number because it is at equal distance from previous prime (12112221212237) and next prime (12112221212239).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112221212237) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 8353063 + ... + 9695261.

It is an arithmetic number, because the mean of its divisors is an integer number (231932160000).

Almost surely, 2^{12112221212238} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12112221212238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14843658240000).

12112221212238 is an abundant number, since it is smaller than the sum of its proper divisors (17575095267762).

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

12112221212238 is a wasteful number, since it uses less digits than its factorization.

12112221212238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1342510.

The product of its digits is 3072, while the sum is 30.

Adding to 12112221212238 its reverse (83221212221121), we get a palindrome (95333433433359).

The spelling of 12112221212238 in words is "twelve trillion, one hundred twelve billion, two hundred twenty-one million, two hundred twelve thousand, two hundred thirty-eight".