99045441721 has 4 divisors (see below), whose sum is σ = 101461184244. Its totient is φ = 96629699200.

The previous prime is 99045441713. The next prime is 99045441763. The reversal of 99045441721 is 12714454099.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12714454099 = 64013 ⋅198623.

It can be written as a sum of positive squares in 2 ways, for example, as 44167225600 + 54878216121 = 210160^2 + 234261^2 .

It is a cyclic number.

It is not a de Polignac number, because 99045441721 - 2³ = 99045441713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99045481721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1207871200 + ... + 1207871281.

It is an arithmetic number, because the mean of its divisors is an integer number (25365296061).

Almost surely, 2^99045441721 is an apocalyptic number.

It is an amenable number.

99045441721 is a deficient number, since it is larger than the sum of its proper divisors (2415742523).

99045441721 is a wasteful number, since it uses less digits than its factorization.

99045441721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2415742522.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 99045441721 in words is "ninety-nine billion, forty-five million, four hundred forty-one thousand, seven hundred twenty-one".