9987581247101 has 2 divisors, whose sum is σ = 9987581247102. Its totient is φ = 9987581247100.

The previous prime is 9987581247079. The next prime is 9987581247209. The reversal of 9987581247101 is 1017421857899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9983236459876 + 4344787225 = 3159626^2 + 65915^2 .

It is an emirp because it is prime and its reverse (1017421857899) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9987581247101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9987581241101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4993790623550 + 4993790623551.

It is an arithmetic number, because the mean of its divisors is an integer number (4993790623551).

Almost surely, 2^{9987581247101} is an apocalyptic number.

It is an amenable number.

9987581247101 is a deficient number, since it is larger than the sum of its proper divisors (1).

9987581247101 is an equidigital number, since it uses as much as digits as its factorization.

9987581247101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10160640, while the sum is 62.

The spelling of 9987581247101 in words is "nine trillion, nine hundred eighty-seven billion, five hundred eighty-one million, two hundred forty-seven thousand, one hundred one".