99900212 has 6 divisors (see below), whose sum is σ = 174825378. Its totient is φ = 49950104.

The previous prime is 99900191. The next prime is 99900221. The reversal of 99900212 is 21200999.

It can be written as a sum of positive squares in only one way, i.e., 88435216 + 11464996 = 9404^2 + 3386^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12487523 + ... + 12487530.

It is an arithmetic number, because the mean of its divisors is an integer number (29137563).

Almost surely, 2^99900212 is an apocalyptic number.

It is an amenable number.

99900212 is a deficient number, since it is larger than the sum of its proper divisors (74925166).

99900212 is a wasteful number, since it uses less digits than its factorization.

99900212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24975057 (or 24975055 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 99900212 is about 9995.0093546730. The cubic root of 99900212 is about 464.0044403558.

The spelling of 99900212 in words is "ninety-nine million, nine hundred thousand, two hundred twelve".