221311505104 has 40 divisors (see below), whose sum is σ = 429734439680. Its totient is φ = 110412574848.

The previous prime is 221311505083. The next prime is 221311505113. The reversal of 221311505104 is 401505113122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14172469 + ... + 14188075.

It is an arithmetic number, because the mean of its divisors is an integer number (10743360992).

Almost surely, 2^221311505104 is an apocalyptic number.

It is an amenable number.

221311505104 is a deficient number, since it is larger than the sum of its proper divisors (208422934576).

221311505104 is a wasteful number, since it uses less digits than its factorization.

221311505104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17507 (or 17501 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 221311505104 its reverse (401505113122), we get a palindrome (622816618226).

The spelling of 221311505104 in words is "two hundred twenty-one billion, three hundred eleven million, five hundred five thousand, one hundred four".