99199121 has 4 divisors (see below), whose sum is σ = 113370432. Its totient is φ = 85027812.

The previous prime is 99199103. The next prime is 99199159. The reversal of 99199121 is 12199199.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 99199121 - 2²⁶ = 32090257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99199181) 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 in 3 ways as a sum of consecutive naturals, for example, 7085645 + ... + 7085658.

It is an arithmetic number, because the mean of its divisors is an integer number (28342608).

Almost surely, 2^99199121 is an apocalyptic number.

It is an amenable number.

99199121 is a deficient number, since it is larger than the sum of its proper divisors (14171311).

99199121 is a wasteful number, since it uses less digits than its factorization.

99199121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14171310.

The product of its digits is 13122, while the sum is 41.

The square root of 99199121 is about 9959.8755514314. The cubic root of 99199121 is about 462.9164436137.

The spelling of 99199121 in words is "ninety-nine million, one hundred ninety-nine thousand, one hundred twenty-one".