99621575940121 has 8 divisors (see below), whose sum is σ = 100741681152000. Its totient is φ = 98501487654240.

The previous prime is 99621575939989. The next prime is 99621575940157. The reversal of 99621575940121 is 12104957512699.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-99621575940121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99621575940121.

It is not an unprimeable number, because it can be changed into a prime (99621575940181) 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 7 ways as a sum of consecutive naturals, for example, 7797256 + ... + 16125766.

It is an arithmetic number, because the mean of its divisors is an integer number (12592710144000).

Almost surely, 2^{99621575940121} is an apocalyptic number.

It is an amenable number.

99621575940121 is a deficient number, since it is larger than the sum of its proper divisors (1120105211879).

99621575940121 is a wasteful number, since it uses less digits than its factorization.

99621575940121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8462999.

The product of its (nonzero) digits is 12247200, while the sum is 61.

The spelling of 99621575940121 in words is "ninety-nine trillion, six hundred twenty-one billion, five hundred seventy-five million, nine hundred forty thousand, one hundred twenty-one".