12421341378 has 24 divisors (see below), whose sum is σ = 27179374716. Its totient is φ = 4099452000.

The previous prime is 12421341377. The next prime is 12421341469. The reversal of 12421341378 is 87314312421.

12421341378 is a `hidden beast` number, since 1 + 24 + 213 + 413 + 7 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 11119069809 + 1302271569 = 105447^2 + 36087^2 .

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (12421341377) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3414393 + ... + 3418028.

Almost surely, 2^12421341378 is an apocalyptic number.

12421341378 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12421341378 is an abundant number, since it is smaller than the sum of its proper divisors (14758033338).

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

12421341378 is a wasteful number, since it uses less digits than its factorization.

12421341378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832530 (or 6832527 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

Adding to 12421341378 its reverse (87314312421), we get a palindrome (99735653799).

The spelling of 12421341378 in words is "twelve billion, four hundred twenty-one million, three hundred forty-one thousand, three hundred seventy-eight".