12421281916 has 6 divisors (see below), whose sum is σ = 21737243360. Its totient is φ = 6210640956.

The previous prime is 12421281913. The next prime is 12421282007. The reversal of 12421281916 is 61918212421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421281913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1552660236 + ... + 1552660243.

Almost surely, 2^12421281916 is an apocalyptic number.

It is an amenable number.

12421281916 is a deficient number, since it is larger than the sum of its proper divisors (9315961444).

12421281916 is a wasteful number, since it uses less digits than its factorization.

12421281916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105320483 (or 3105320481 counting only the distinct ones).

The product of its digits is 13824, while the sum is 37.

The spelling of 12421281916 in words is "twelve billion, four hundred twenty-one million, two hundred eighty-one thousand, nine hundred sixteen".