12484845521 has 2 divisors, whose sum is σ = 12484845522. Its totient is φ = 12484845520.

The previous prime is 12484845473. The next prime is 12484845547. The reversal of 12484845521 is 12554848421.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9419673025 + 3065172496 = 97055^2 + 55364^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12484845521 is a prime.

It is a super-2 number, since 2×12484845521² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12484845421) 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, 6242422760 + 6242422761.

It is an arithmetic number, because the mean of its divisors is an integer number (6242422761).

Almost surely, 2^12484845521 is an apocalyptic number.

It is an amenable number.

12484845521 is a deficient number, since it is larger than the sum of its proper divisors (1).

12484845521 is an equidigital number, since it uses as much as digits as its factorization.

12484845521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 409600, while the sum is 44.

The spelling of 12484845521 in words is "twelve billion, four hundred eighty-four million, eight hundred forty-five thousand, five hundred twenty-one".