1243242112122 has 96 divisors (see below), whose sum is σ = 2795001431040. Its totient is φ = 398970593280.

The previous prime is 1243242112109. The next prime is 1243242112241. The reversal of 1243242112122 is 2212112423421.

1243242112122 is a `hidden beast` number, since 1 + 2 + 4 + 324 + 211 + 2 + 122 = 666.

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 47 ways as a sum of consecutive naturals, for example, 120312468 + ... + 120322800.

It is an arithmetic number, because the mean of its divisors is an integer number (29114598240).

Almost surely, 2^{1243242112122} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1243242112122, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1397500715520).

1243242112122 is an abundant number, since it is smaller than the sum of its proper divisors (1551759318918).

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

1243242112122 is a wasteful number, since it uses less digits than its factorization.

1243242112122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11468 (or 11465 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

Adding to 1243242112122 its reverse (2212112423421), we get a palindrome (3455354535543).

The spelling of 1243242112122 in words is "one trillion, two hundred forty-three billion, two hundred forty-two million, one hundred twelve thousand, one hundred twenty-two".