99521320900 has 27 divisors (see below), whose sum is σ = 215968112269. Its totient is φ = 39807266480.

The previous prime is 99521320879. The next prime is 99521320901. The reversal of 99521320900 is 902312599.

The square root of 99521320900 is 315470.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 35827675524 + 63693645376 = 189282^2 + 252376^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99521320901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3138927 + ... + 3170473.

Almost surely, 2^99521320900 is an apocalyptic number.

99521320900 is the 315470-th square number.

It is an amenable number.

99521320900 is an abundant number, since it is smaller than the sum of its proper divisors (116446791369).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99521320900 is an frugal number, since it uses more digits than its factorization.

99521320900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63108 (or 31554 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The spelling of 99521320900 in words is "ninety-nine billion, five hundred twenty-one million, three hundred twenty thousand, nine hundred".