99996121 has 2 divisors, whose sum is σ = 99996122. Its totient is φ = 99996120.

The previous prime is 99996097. The next prime is 99996131. The reversal of 99996121 is 12169999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 96040000 + 3956121 = 9800^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 99996121 - 2¹¹ = 99994073 is a prime.

It is not a weakly prime, because it can be changed into another prime (99996131) 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 as a sum of consecutive naturals, namely, 49998060 + 49998061.

It is an arithmetic number, because the mean of its divisors is an integer number (49998061).

Almost surely, 2^99996121 is an apocalyptic number.

It is an amenable number.

99996121 is a deficient number, since it is larger than the sum of its proper divisors (1).

99996121 is an equidigital number, since it uses as much as digits as its factorization.

99996121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 46.

The square root of 99996121 is about 9999.8060481191. The cubic root of 99996121 is about 464.1528817093.

The spelling of 99996121 in words is "ninety-nine million, nine hundred ninety-six thousand, one hundred twenty-one".