99497362508221 has 2 divisors, whose sum is σ = 99497362508222. Its totient is φ = 99497362508220.

The previous prime is 99497362508207. The next prime is 99497362508237. The reversal of 99497362508221 is 12280526379499.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 65530158304900 + 33967204203321 = 8095070^2 + 5828139^2 .

It is a cyclic number.

It is not a de Polignac number, because 99497362508221 - 2²⁹ = 99496825637309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (99497362508281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49748681254110 + 49748681254111.

It is an arithmetic number, because the mean of its divisors is an integer number (49748681254111).

It is a 1-persistent number, because it is pandigital, but 2⋅99497362508221 = 198994725016442 is not.

Almost surely, 2^{99497362508221} is an apocalyptic number.

It is an amenable number.

99497362508221 is a deficient number, since it is larger than the sum of its proper divisors (1).

99497362508221 is an equidigital number, since it uses as much as digits as its factorization.

99497362508221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 117573120, while the sum is 67.

The spelling of 99497362508221 in words is "ninety-nine trillion, four hundred ninety-seven billion, three hundred sixty-two million, five hundred eight thousand, two hundred twenty-one".