221021220099 has 8 divisors (see below), whose sum is σ = 294963601680. Its totient is φ = 147213159296.

The previous prime is 221021220071. The next prime is 221021220109. The reversal of 221021220099 is 990022120122.

221021220099 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221021220099 - 2²⁰ = 221020171523 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221021260099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33576354 + ... + 33582935.

It is an arithmetic number, because the mean of its divisors is an integer number (36870450210).

Almost surely, 2^221021220099 is an apocalyptic number.

221021220099 is a deficient number, since it is larger than the sum of its proper divisors (73942381581).

221021220099 is a wasteful number, since it uses less digits than its factorization.

221021220099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67160389.

The product of its (nonzero) digits is 2592, while the sum is 30.

The spelling of 221021220099 in words is "two hundred twenty-one billion, twenty-one million, two hundred twenty thousand, ninety-nine".