12421404346 has 12 divisors (see below), whose sum is σ = 20175595182. Its totient is φ = 5732955696.

The previous prime is 12421404341. The next prime is 12421404379. The reversal of 12421404346 is 64340412421.

It can be written as a sum of positive squares in 3 ways, for example, as 9831714025 + 2589690321 = 99155^2 + 50889^2 .

It is not an unprimeable number, because it can be changed into a prime (12421404341) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 18374521 + ... + 18375196.

Almost surely, 2^12421404346 is an apocalyptic number.

12421404346 is a deficient number, since it is larger than the sum of its proper divisors (7754190836).

12421404346 is a wasteful number, since it uses less digits than its factorization.

12421404346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36749745 (or 36749732 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 12421404346 its reverse (64340412421), we get a palindrome (76761816767).

The spelling of 12421404346 in words is "twelve billion, four hundred twenty-one million, four hundred four thousand, three hundred forty-six".