221200099 has 4 divisors (see below), whose sum is σ = 223157736. Its totient is φ = 219242464.

The previous prime is 221200093. The next prime is 221200121. The reversal of 221200099 is 990002122.

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-221200099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (221200093) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 978649 + ... + 978874.

It is an arithmetic number, because the mean of its divisors is an integer number (55789434).

Almost surely, 2^221200099 is an apocalyptic number.

221200099 is a deficient number, since it is larger than the sum of its proper divisors (1957637).

221200099 is a wasteful number, since it uses less digits than its factorization.

221200099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1957636.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 221200099 is about 14872.7972822869. The cubic root of 221200099 is about 604.7767762418.

The spelling of 221200099 in words is "two hundred twenty-one million, two hundred thousand, ninety-nine".