221053338166 has 16 divisors (see below), whose sum is σ = 332785750608. Its totient is φ = 110124835200.

The previous prime is 221053338151. The next prime is 221053338217. The reversal of 221053338166 is 661833350122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9565746 + ... + 9588826.

It is an arithmetic number, because the mean of its divisors is an integer number (20799109413).

Almost surely, 2^221053338166 is an apocalyptic number.

221053338166 is a deficient number, since it is larger than the sum of its proper divisors (111732412442).

221053338166 is a wasteful number, since it uses less digits than its factorization.

221053338166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40287.

The product of its (nonzero) digits is 155520, while the sum is 40.

Adding to 221053338166 its reverse (661833350122), we get a palindrome (882886688288).

The spelling of 221053338166 in words is "two hundred twenty-one billion, fifty-three million, three hundred thirty-eight thousand, one hundred sixty-six".