99129120 has 48 divisors (see below), whose sum is σ = 312258240. Its totient is φ = 26434304.

The previous prime is 99129077. The next prime is 99129127. The reversal of 99129120 is 2192199.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (99129127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 102780 + ... + 103739.

It is an arithmetic number, because the mean of its divisors is an integer number (6505380).

Almost surely, 2^99129120 is an apocalyptic number.

It is an amenable number.

99129120 is an abundant number, since it is smaller than the sum of its proper divisors (213129120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

99129120 is a wasteful number, since it uses less digits than its factorization.

99129120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206537 (or 206529 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 99129120 is about 9956.3607809279. The cubic root of 99129120 is about 462.8075305545.

The spelling of 99129120 in words is "ninety-nine million, one hundred twenty-nine thousand, one hundred twenty".