12215432424 has 128 divisors (see below), whose sum is σ = 35107430400. Its totient is φ = 3510501120.

The previous prime is 12215432413. The next prime is 12215432473. The reversal of 12215432424 is 42423451221.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12215432391 and 12215432400.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 406377 + ... + 435399.

It is an arithmetic number, because the mean of its divisors is an integer number (274276800).

Almost surely, 2^12215432424 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12215432424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17553715200).

12215432424 is an abundant number, since it is smaller than the sum of its proper divisors (22891997976).

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

12215432424 is a wasteful number, since it uses less digits than its factorization.

12215432424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29135 (or 29131 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

Adding to 12215432424 its reverse (42423451221), we get a palindrome (54638883645).

The spelling of 12215432424 in words is "twelve billion, two hundred fifteen million, four hundred thirty-two thousand, four hundred twenty-four".