12421422551263 has 4 divisors (see below), whose sum is σ = 13550642783208. Its totient is φ = 11292202319320.

The previous prime is 12421422551257. The next prime is 12421422551389. The reversal of 12421422551263 is 36215522412421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12421422551263 - 2¹³ = 12421422543071 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421422551063) 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 3 ways as a sum of consecutive naturals, for example, 564610115956 + ... + 564610115977.

It is an arithmetic number, because the mean of its divisors is an integer number (3387660695802).

Almost surely, 2^{12421422551263} is an apocalyptic number.

12421422551263 is a deficient number, since it is larger than the sum of its proper divisors (1129220231945).

12421422551263 is a wasteful number, since it uses less digits than its factorization.

12421422551263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1129220231944.

The product of its digits is 230400, while the sum is 40.

Adding to 12421422551263 its reverse (36215522412421), we get a palindrome (48636944963684).

The spelling of 12421422551263 in words is "twelve trillion, four hundred twenty-one billion, four hundred twenty-two million, five hundred fifty-one thousand, two hundred sixty-three".