99999230321 has 2 divisors, whose sum is σ = 99999230322. Its totient is φ = 99999230320.

The previous prime is 99999230269. The next prime is 99999230327. The reversal of 99999230321 is 12303299999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96914538721 + 3084691600 = 311311^2 + 55540^2 .

It is a cyclic number.

It is not a de Polignac number, because 99999230321 - 2⁶ = 99999230257 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (99999230327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49999615160 + 49999615161.

It is an arithmetic number, because the mean of its divisors is an integer number (49999615161).

Almost surely, 2^99999230321 is an apocalyptic number.

It is an amenable number.

99999230321 is a deficient number, since it is larger than the sum of its proper divisors (1).

99999230321 is an equidigital number, since it uses as much as digits as its factorization.

99999230321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2125764, while the sum is 56.

The spelling of 99999230321 in words is "ninety-nine billion, nine hundred ninety-nine million, two hundred thirty thousand, three hundred twenty-one".