12421858528 has 12 divisors (see below), whose sum is σ = 24455534040. Its totient is φ = 6210929248.

The previous prime is 12421858507. The next prime is 12421858529. The reversal of 12421858528 is 82585812421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421858529) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194091508 + ... + 194091571.

It is an arithmetic number, because the mean of its divisors is an integer number (2037961170).

Almost surely, 2^12421858528 is an apocalyptic number.

It is an amenable number.

12421858528 is a deficient number, since it is larger than the sum of its proper divisors (12033675512).

12421858528 is an equidigital number, since it uses as much as digits as its factorization.

12421858528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 388183089 (or 388183081 counting only the distinct ones).

The product of its digits is 409600, while the sum is 46.

The spelling of 12421858528 in words is "twelve billion, four hundred twenty-one million, eight hundred fifty-eight thousand, five hundred twenty-eight".