221320244650 has 12 divisors (see below), whose sum is σ = 411655655142. Its totient is φ = 88528097840.

The previous prime is 221320244641. The next prime is 221320244683. The reversal of 221320244650 is 56442023122.

221320244650 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 120930758001 + 100389486649 = 347751^2 + 316843^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2213202397 + ... + 2213202496.

Almost surely, 2^221320244650 is an apocalyptic number.

221320244650 is a deficient number, since it is larger than the sum of its proper divisors (190335410492).

221320244650 is a wasteful number, since it uses less digits than its factorization.

221320244650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4426404905 (or 4426404900 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 221320244650 its reverse (56442023122), we get a palindrome (277762267772).

The spelling of 221320244650 in words is "two hundred twenty-one billion, three hundred twenty million, two hundred forty-four thousand, six hundred fifty".