12421422504243 has 12 divisors (see below), whose sum is σ = 17954788639320. Its totient is φ = 8275071146496.

The previous prime is 12421422504241. The next prime is 12421422504263. The reversal of 12421422504243 is 34240522412421.

12421422504243 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 1 + 4 + 225 + 0 + 424 + 3 = 666.

It is not a de Polignac number, because 12421422504243 - 2¹ = 12421422504241 is a prime.

It is a super-4 number, since 4×12421422504243⁴ (a number of 53 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12421422504198 and 12421422504207.

It is not an unprimeable number, because it can be changed into a prime (12421422504241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 489752421 + ... + 489777782.

It is an arithmetic number, because the mean of its divisors is an integer number (1496232386610).

Almost surely, 2^{12421422504243} is an apocalyptic number.

12421422504243 is a deficient number, since it is larger than the sum of its proper divisors (5533366135077).

12421422504243 is a wasteful number, since it uses less digits than its factorization.

12421422504243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979531618 (or 979531615 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 36.

Adding to 12421422504243 its reverse (34240522412421), we get a palindrome (46661944916664).

The spelling of 12421422504243 in words is "twelve trillion, four hundred twenty-one billion, four hundred twenty-two million, five hundred four thousand, two hundred forty-three".