90101243340217 has 2 divisors, whose sum is σ = 90101243340218. Its totient is φ = 90101243340216.

The previous prime is 90101243340149. The next prime is 90101243340233. The reversal of 90101243340217 is 71204334210109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77774831552016 + 12326411788201 = 8819004^2 + 3510899^2 .

It is an emirp because it is prime and its reverse (71204334210109) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90101243340217 is a prime.

It is not a weakly prime, because it can be changed into another prime (90101273340217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45050621670108 + 45050621670109.

It is an arithmetic number, because the mean of its divisors is an integer number (45050621670109).

Almost surely, 2^{90101243340217} is an apocalyptic number.

It is an amenable number.

90101243340217 is a deficient number, since it is larger than the sum of its proper divisors (1).

90101243340217 is an equidigital number, since it uses as much as digits as its factorization.

90101243340217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 37.

The spelling of 90101243340217 in words is "ninety trillion, one hundred one billion, two hundred forty-three million, three hundred forty thousand, two hundred seventeen".