99000900121 has 2 divisors, whose sum is σ = 99000900122. Its totient is φ = 99000900120.

The previous prime is 99000900073. The next prime is 99000900209. The reversal of 99000900121 is 12100900099.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69058058521 + 29942841600 = 262789^2 + 173040^2 .

It is a cyclic number.

It is not a de Polignac number, because 99000900121 - 2⁷ = 99000899993 is a prime.

It is not a weakly prime, because it can be changed into another prime (99000900221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49500450060 + 49500450061.

It is an arithmetic number, because the mean of its divisors is an integer number (49500450061).

Almost surely, 2^99000900121 is an apocalyptic number.

It is an amenable number.

99000900121 is a deficient number, since it is larger than the sum of its proper divisors (1).

99000900121 is an equidigital number, since it uses as much as digits as its factorization.

99000900121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 31.

The spelling of 99000900121 in words is "ninety-nine billion, nine hundred thousand, one hundred twenty-one".