99606200421 has 32 divisors (see below), whose sum is σ = 163546421248. Its totient is φ = 52510576320.

The previous prime is 99606200411. The next prime is 99606200423. The reversal of 99606200421 is 12400260699.

It is not a de Polignac number, because 99606200421 - 2⁶ = 99606200357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is the 315605-th Hogben number.

It is a self number, because there is not a number n which added to its sum of digits gives 99606200421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99606200423) by changing a digit.

It is a nontrivial repunit in base 315604.

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 31 ways as a sum of consecutive naturals, for example, 400230 + ... + 599496.

It is an arithmetic number, because the mean of its divisors is an integer number (5110825664).

Almost surely, 2^99606200421 is an apocalyptic number.

99606200421 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

99606200421 is a deficient number, since it is larger than the sum of its proper divisors (63940220827).

99606200421 is a wasteful number, since it uses less digits than its factorization.

99606200421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201121.

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 99606200421 in words is "ninety-nine billion, six hundred six million, two hundred thousand, four hundred twenty-one".