99201420506821 has 16 divisors (see below), whose sum is σ = 104483123869824. Its totient is φ = 94000453564864.

The previous prime is 99201420506791. The next prime is 99201420506827. The reversal of 99201420506821 is 12860502410299.

It is a cyclic number.

It is not a de Polignac number, because 99201420506821 - 2²⁷ = 99201286289093 is a prime.

It is a super-2 number, since 2×99201420506821² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (99201420506827) 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 15 ways as a sum of consecutive naturals, for example, 300069411 + ... + 300399823.

It is an arithmetic number, because the mean of its divisors is an integer number (6530195241864).

Almost surely, 2^{99201420506821} is an apocalyptic number.

It is an amenable number.

99201420506821 is a deficient number, since it is larger than the sum of its proper divisors (5281703363003).

99201420506821 is a wasteful number, since it uses less digits than its factorization.

99201420506821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452540.

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 99201420506821 in words is "ninety-nine trillion, two hundred one billion, four hundred twenty million, five hundred six thousand, eight hundred twenty-one".