221065106 has 8 divisors (see below), whose sum is σ = 333710220. Its totient is φ = 109828368.

The previous prime is 221065079. The next prime is 221065129. The reversal of 221065106 is 601560122.

It can be written as a sum of positive squares in 2 ways, for example, as 216825625 + 4239481 = 14725^2 + 2059^2 .

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, 351701 + ... + 352328.

Almost surely, 2^221065106 is an apocalyptic number.

221065106 is a deficient number, since it is larger than the sum of its proper divisors (112645114).

221065106 is a wasteful number, since it uses less digits than its factorization.

221065106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704188.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 221065106 is about 14868.2583378148. The cubic root of 221065106 is about 604.6537243910.

The spelling of 221065106 in words is "two hundred twenty-one million, sixty-five thousand, one hundred six".