12402021424 has 80 divisors (see below), whose sum is σ = 27616232448. Its totient is φ = 5344690176.

The previous prime is 12402021421. The next prime is 12402021433. The reversal of 12402021424 is 42412020421.

12402021424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 12402021395 and 12402021404.

It is not an unprimeable number, because it can be changed into a prime (12402021421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435264 + ... + 462880.

Almost surely, 2^12402021424 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 12402021424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13808116224).

12402021424 is an abundant number, since it is smaller than the sum of its proper divisors (15214211024).

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

12402021424 is a wasteful number, since it uses less digits than its factorization.

12402021424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27782 (or 27776 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 12402021424 its reverse (42412020421), we get a palindrome (54814041845).

The spelling of 12402021424 in words is "twelve billion, four hundred two million, twenty-one thousand, four hundred twenty-four".