12421317454056 has 96 divisors (see below), whose sum is σ = 38454223454400. Its totient is φ = 3548275061760.

The previous prime is 12421317454037. The next prime is 12421317454069. The reversal of 12421317454056 is 65045471312421.

It is a happy number.

12421317454056 is a `hidden beast` number, since 1 + 2 + 4 + 2 + 1 + 31 + 74 + 540 + 5 + 6 = 666.

It is a super-2 number, since 2×12421317454056² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

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 in 23 ways as a sum of consecutive naturals, for example, 328215 + ... + 4995033.

It is an arithmetic number, because the mean of its divisors is an integer number (400564827650).

Almost surely, 2^{12421317454056} is an apocalyptic number.

It is an amenable number.

12421317454056 is an abundant number, since it is smaller than the sum of its proper divisors (26032906000344).

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

12421317454056 is a wasteful number, since it uses less digits than its factorization.

12421317454056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4672119 (or 4672112 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

Adding to 12421317454056 its reverse (65045471312421), we get a palindrome (77466788766477).

The spelling of 12421317454056 in words is "twelve trillion, four hundred twenty-one billion, three hundred seventeen million, four hundred fifty-four thousand, fifty-six".