212900099 has 4 divisors (see below), whose sum is σ = 216917136. Its totient is φ = 208883064.

The previous prime is 212900081. The next prime is 212900113. The reversal of 212900099 is 990009212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212900099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212900059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2008439 + ... + 2008544.

It is an arithmetic number, because the mean of its divisors is an integer number (54229284).

Almost surely, 2^212900099 is an apocalyptic number.

212900099 is a deficient number, since it is larger than the sum of its proper divisors (4017037).

212900099 is an equidigital number, since it uses as much as digits as its factorization.

212900099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4017036.

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

The square root of 212900099 is about 14591.0965660570. The cubic root of 212900099 is about 597.1158799288.

The spelling of 212900099 in words is "two hundred twelve million, nine hundred thousand, ninety-nine".