99060638121 has 21 divisors (see below), whose sum is σ = 148535756551. Its totient is φ = 66034760112.

The previous prime is 99060638119. The next prime is 99060638177. The reversal of 99060638121 is 12183606099.

It is a happy number.

The square root of 99060638121 is 314739.

It is a perfect power (a square), and thus also a powerful number.

99060638121 is a `hidden beast` number, since 9 + 9 + 0 + 6 + 0 + 638 + 1 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 72535955625 + 26524682496 = 269325^2 + 162864^2 .

It is not a de Polignac number, because 99060638121 - 2¹ = 99060638119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (99060638111) 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 20 ways as a sum of consecutive naturals, for example, 8492125 + ... + 8503781.

Almost surely, 2^99060638121 is an apocalyptic number.

99060638121 is the 314739-th square number.

99060638121 is the 157370-th centered octagonal number.

It is an amenable number.

99060638121 is a deficient number, since it is larger than the sum of its proper divisors (49475118430).

99060638121 is an frugal number, since it uses more digits than its factorization.

99060638121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23332 (or 11660 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The spelling of 99060638121 in words is "ninety-nine billion, sixty million, six hundred thirty-eight thousand, one hundred twenty-one".