12421516024 has 8 divisors (see below), whose sum is σ = 23290342560. Its totient is φ = 6210758008.

The previous prime is 12421516001. The next prime is 12421516027. The reversal of 12421516024 is 42061512421.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 12421515983 and 12421516001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12421516027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 776344744 + ... + 776344759.

It is an arithmetic number, because the mean of its divisors is an integer number (2911292820).

Almost surely, 2^12421516024 is an apocalyptic number.

It is an amenable number.

12421516024 is a deficient number, since it is larger than the sum of its proper divisors (10868826536).

12421516024 is a wasteful number, since it uses less digits than its factorization.

12421516024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1552689509 (or 1552689505 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The spelling of 12421516024 in words is "twelve billion, four hundred twenty-one million, five hundred sixteen thousand, twenty-four".