12421135539 has 16 divisors (see below), whose sum is σ = 18713577600. Its totient is φ = 8140404168.

The previous prime is 12421135523. The next prime is 12421135567. The reversal of 12421135539 is 93553112421.

It is a happy number.

12421135539 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 113 + 5 + 539 = 666.

It is not a de Polignac number, because 12421135539 - 2⁴ = 12421135523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12421135589) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3897069 + ... + 3900254.

It is an arithmetic number, because the mean of its divisors is an integer number (1169598600).

Almost surely, 2^12421135539 is an apocalyptic number.

12421135539 is a deficient number, since it is larger than the sum of its proper divisors (6292442061).

12421135539 is an equidigital number, since it uses as much as digits as its factorization.

12421135539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7797391 (or 7797385 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The spelling of 12421135539 in words is "twelve billion, four hundred twenty-one million, one hundred thirty-five thousand, five hundred thirty-nine".