21221241304 has 64 divisors (see below), whose sum is σ = 43035300000. Its totient is φ = 9773488128.

The previous prime is 21221241281. The next prime is 21221241317. The reversal of 21221241304 is 40314212212.

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 15 ways as a sum of consecutive naturals, for example, 1831722 + ... + 1843270.

Almost surely, 2^21221241304 is an apocalyptic number.

It is an amenable number.

21221241304 is an abundant number, since it is smaller than the sum of its proper divisors (21814058696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21221241304 is a wasteful number, since it uses less digits than its factorization.

21221241304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11860 (or 11856 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21221241304 its reverse (40314212212), we get a palindrome (61535453516).

The spelling of 21221241304 in words is "twenty-one billion, two hundred twenty-one million, two hundred forty-one thousand, three hundred four".