12421286811531 has 24 divisors (see below), whose sum is σ = 20338949168720. Its totient is φ = 7241559921216.

The previous prime is 12421286811529. The next prime is 12421286811559. The reversal of 12421286811531 is 13511868212421.

12421286811531 is a `hidden beast` number, since 1 + 2 + 4 + 21 + 2 + 86 + 8 + 11 + 531 = 666.

12421286811531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12421286811531 - 2¹ = 12421286811529 is a prime.

It is a super-2 number, since 2×12421286811531² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12421286811931) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2793809476 + ... + 2793813921.

Almost surely, 2^{12421286811531} is an apocalyptic number.

12421286811531 is a deficient number, since it is larger than the sum of its proper divisors (7917662357189).

12421286811531 is a wasteful number, since it uses less digits than its factorization.

12421286811531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5587623435 (or 5587623432 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The spelling of 12421286811531 in words is "twelve trillion, four hundred twenty-one billion, two hundred eighty-six million, eight hundred eleven thousand, five hundred thirty-one".