99201668921 has 8 divisors (see below), whose sum is σ = 101107764000. Its totient is φ = 97303064320.

The previous prime is 99201668831. The next prime is 99201668927. The reversal of 99201668921 is 12986610299.

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

It is not a de Polignac number, because 99201668921 - 2¹⁰ = 99201667897 is a prime.

It is a super-2 number, since 2×99201668921² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99201668927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1845875 + ... + 1898856.

It is an arithmetic number, because the mean of its divisors is an integer number (12638470500).

Almost surely, 2^99201668921 is an apocalyptic number.

It is an amenable number.

99201668921 is a deficient number, since it is larger than the sum of its proper divisors (1906095079).

99201668921 is a wasteful number, since it uses less digits than its factorization.

99201668921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745239.

The product of its (nonzero) digits is 839808, while the sum is 53.

The spelling of 99201668921 in words is "ninety-nine billion, two hundred one million, six hundred sixty-eight thousand, nine hundred twenty-one".