99921201 has 32 divisors (see below), whose sum is σ = 141834240. Its totient is φ = 62490816.

The previous prime is 99921193. The next prime is 99921221. The reversal of 99921201 is 10212999.

It is not a de Polignac number, because 99921201 - 2³ = 99921193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (99921221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558130 + ... + 558308.

It is an arithmetic number, because the mean of its divisors is an integer number (4432320).

Almost surely, 2^99921201 is an apocalyptic number.

It is an amenable number.

99921201 is a deficient number, since it is larger than the sum of its proper divisors (41913039).

99921201 is a wasteful number, since it uses less digits than its factorization.

99921201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373.

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

The square root of 99921201 is about 9996.0592735337. The cubic root of 99921201 is about 464.0369338045.

The spelling of 99921201 in words is "ninety-nine million, nine hundred twenty-one thousand, two hundred one".