12421142344 has 32 divisors (see below), whose sum is σ = 26556518520. Its totient is φ = 5395608576.

The previous prime is 12421142339. The next prime is 12421142347. The reversal of 12421142344 is 44324112421.

12421142344 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 12218649444 + 202492900 = 110538^2 + 14230^2 .

It is not an unprimeable number, because it can be changed into a prime (12421142347) 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 7 ways as a sum of consecutive naturals, for example, 3510999 + ... + 3514534.

Almost surely, 2^12421142344 is an apocalyptic number.

It is an amenable number.

12421142344 is an abundant number, since it is smaller than the sum of its proper divisors (14135376176).

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

12421142344 is a wasteful number, since it uses less digits than its factorization.

12421142344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7025569 (or 7025565 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

Adding to 12421142344 its reverse (44324112421), we get a palindrome (56745254765).

The spelling of 12421142344 in words is "twelve billion, four hundred twenty-one million, one hundred forty-two thousand, three hundred forty-four".