99609421321 has 8 divisors (see below), whose sum is σ = 102043240488. Its totient is φ = 97175808000.

The previous prime is 99609421259. The next prime is 99609421369. The reversal of 99609421321 is 12312490699.

It can be written as a sum of positive squares in 4 ways, for example, as 28783225 + 99580638096 = 5365^2 + 315564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 99609421321 - 2¹⁹ = 99608897033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99609421391) 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 7 ways as a sum of consecutive naturals, for example, 1472481 + ... + 1538641.

It is an arithmetic number, because the mean of its divisors is an integer number (12755405061).

Almost surely, 2^99609421321 is an apocalyptic number.

It is an amenable number.

99609421321 is a deficient number, since it is larger than the sum of its proper divisors (2433819167).

99609421321 is a wasteful number, since it uses less digits than its factorization.

99609421321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102923.

The product of its (nonzero) digits is 209952, while the sum is 46.

The spelling of 99609421321 in words is "ninety-nine billion, six hundred nine million, four hundred twenty-one thousand, three hundred twenty-one".