12421603356415 has 16 divisors (see below), whose sum is σ = 16785556678656. Its totient is φ = 8742477434400.

The previous prime is 12421603356403. The next prime is 12421603356479. The reversal of 12421603356415 is 51465330612421.

It is not a de Polignac number, because 12421603356415 - 2¹¹ = 12421603354367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3642697227 + ... + 3642700636.

It is an arithmetic number, because the mean of its divisors is an integer number (1049097292416).

Almost surely, 2^{12421603356415} is an apocalyptic number.

12421603356415 is a deficient number, since it is larger than the sum of its proper divisors (4363953322241).

12421603356415 is a wasteful number, since it uses less digits than its factorization.

12421603356415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7285397910.

The product of its (nonzero) digits is 518400, while the sum is 43.

Adding to 12421603356415 its reverse (51465330612421), we get a palindrome (63886933968836).

The spelling of 12421603356415 in words is "twelve trillion, four hundred twenty-one billion, six hundred three million, three hundred fifty-six thousand, four hundred fifteen".