221115200066 has 8 divisors (see below), whose sum is σ = 334607957964. Its totient is φ = 109579214080.

The previous prime is 221115199993. The next prime is 221115200077. The reversal of 221115200066 is 660002511122.

It can be written as a sum of positive squares in 2 ways, for example, as 220228411225 + 886788841 = 469285^2 + 29779^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489192695 + ... + 489193146.

Almost surely, 2^221115200066 is an apocalyptic number.

221115200066 is a deficient number, since it is larger than the sum of its proper divisors (113492757898).

221115200066 is a wasteful number, since it uses less digits than its factorization.

221115200066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978385956.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 221115200066 its reverse (660002511122), we get a palindrome (881117711188).

The spelling of 221115200066 in words is "two hundred twenty-one billion, one hundred fifteen million, two hundred thousand, sixty-six".