99061321321 has 4 divisors (see below), whose sum is σ = 99062352000. Its totient is φ = 99060290644.

The previous prime is 99061321319. The next prime is 99061321327. The reversal of 99061321321 is 12312316099.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12312316099 = 211 ⋅58352209.

It is a cyclic number.

It is not a de Polignac number, because 99061321321 - 2¹ = 99061321319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99061321327) 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, 354421 + ... + 568978.

It is an arithmetic number, because the mean of its divisors is an integer number (24765588000).

Almost surely, 2^99061321321 is an apocalyptic number.

It is an amenable number.

99061321321 is a deficient number, since it is larger than the sum of its proper divisors (1030679).

99061321321 is a wasteful number, since it uses less digits than its factorization.

99061321321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030678.

The product of its (nonzero) digits is 17496, while the sum is 37.

The spelling of 99061321321 in words is "ninety-nine billion, sixty-one million, three hundred twenty-one thousand, three hundred twenty-one".