12240043432138 has 8 divisors (see below), whose sum is σ = 18522543601188. Its totient is φ = 6065862231744.

The previous prime is 12240043432079. The next prime is 12240043432139. The reversal of 12240043432138 is 83123434004221.

12240043432138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11704999460049 + 535043972089 = 3421257^2 + 731467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12240043432138² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12240043432097 and 12240043432106.

It is not an unprimeable number, because it can be changed into a prime (12240043432139) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27079741881 + ... + 27079742332.

Almost surely, 2^{12240043432138} is an apocalyptic number.

12240043432138 is a deficient number, since it is larger than the sum of its proper divisors (6282500169050).

12240043432138 is a wasteful number, since it uses less digits than its factorization.

12240043432138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54159484328.

The product of its (nonzero) digits is 110592, while the sum is 37.

Adding to 12240043432138 its reverse (83123434004221), we get a palindrome (95363477436359).

The spelling of 12240043432138 in words is "twelve trillion, two hundred forty billion, forty-three million, four hundred thirty-two thousand, one hundred thirty-eight".