99321121 has 2 divisors, whose sum is σ = 99321122. Its totient is φ = 99321120.

The previous prime is 99321097. The next prime is 99321163. The reversal of 99321121 is 12112399.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94303521 + 5017600 = 9711^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 99321121 - 2⁹ = 99320609 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 99321121.

It is not a weakly prime, because it can be changed into another prime (99321421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 49660560 + 49660561.

It is an arithmetic number, because the mean of its divisors is an integer number (49660561).

Almost surely, 2^99321121 is an apocalyptic number.

It is an amenable number.

99321121 is a deficient number, since it is larger than the sum of its proper divisors (1).

99321121 is an equidigital number, since it uses as much as digits as its factorization.

99321121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 972, while the sum is 28.

The square root of 99321121 is about 9965.9982440295. The cubic root of 99321121 is about 463.1061384050.

The spelling of 99321121 in words is "ninety-nine million, three hundred twenty-one thousand, one hundred twenty-one".