12421465504 has 72 divisors (see below), whose sum is σ = 28471272228. Its totient is φ = 5319014400.

The previous prime is 12421465499. The next prime is 12421465523. The reversal of 12421465504 is 40556412421.

It can be written as a sum of positive squares in 2 ways, for example, as 8306499600 + 4114965904 = 91140^2 + 64148^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12421465504.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2432554 + ... + 2437654.

Almost surely, 2^12421465504 is an apocalyptic number.

12421465504 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12421465504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14235636114).

12421465504 is an abundant number, since it is smaller than the sum of its proper divisors (16049806724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12421465504 is a wasteful number, since it uses less digits than its factorization.

12421465504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6678 (or 6663 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 12421465504 its reverse (40556412421), we get a palindrome (52977877925).

The spelling of 12421465504 in words is "twelve billion, four hundred twenty-one million, four hundred sixty-five thousand, five hundred four".