12421573531 has 2 divisors, whose sum is σ = 12421573532. Its totient is φ = 12421573530.

The previous prime is 12421573391. The next prime is 12421573543. The reversal of 12421573531 is 13537512421.

12421573531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (13537512421) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12421573531 - 2¹¹ = 12421571483 is a prime.

It is a super-2 number, since 2×12421573531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12421573231) 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 as a sum of consecutive naturals, namely, 6210786765 + 6210786766.

It is an arithmetic number, because the mean of its divisors is an integer number (6210786766).

Almost surely, 2^12421573531 is an apocalyptic number.

12421573531 is a deficient number, since it is larger than the sum of its proper divisors (1).

12421573531 is an equidigital number, since it uses as much as digits as its factorization.

12421573531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 34.

The spelling of 12421573531 in words is "twelve billion, four hundred twenty-one million, five hundred seventy-three thousand, five hundred thirty-one".