9988052310521 has 2 divisors, whose sum is σ = 9988052310522. Its totient is φ = 9988052310520.

The previous prime is 9988052310409. The next prime is 9988052310557. The reversal of 9988052310521 is 1250132508899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7854594786025 + 2133457524496 = 2802605^2 + 1460636^2 .

It is an emirp because it is prime and its reverse (1250132508899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9988052310521 is a prime.

It is a super-2 number, since 2×9988052310521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9988052310581) by changing a digit.

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 as a sum of consecutive naturals, namely, 4994026155260 + 4994026155261.

It is an arithmetic number, because the mean of its divisors is an integer number (4994026155261).

Almost surely, 2^{9988052310521} is an apocalyptic number.

It is an amenable number.

9988052310521 is a deficient number, since it is larger than the sum of its proper divisors (1).

9988052310521 is an equidigital number, since it uses as much as digits as its factorization.

9988052310521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1555200, while the sum is 53.

The spelling of 9988052310521 in words is "nine trillion, nine hundred eighty-eight billion, fifty-two million, three hundred ten thousand, five hundred twenty-one".