221304242012 has 12 divisors (see below), whose sum is σ = 442608484080. Its totient is φ = 94844675136.

The previous prime is 221304241993. The next prime is 221304242059. The reversal of 221304242012 is 210242403122.

221304242012 is an admirable number.

It is a congruent number.

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, 3951861437 + ... + 3951861492.

It is an arithmetic number, because the mean of its divisors is an integer number (36884040340).

Almost surely, 2^221304242012 is an apocalyptic number.

It is an amenable number.

221304242012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221304242012 is a wasteful number, since it uses less digits than its factorization.

221304242012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7903722940 (or 7903722938 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 221304242012 its reverse (210242403122), we get a palindrome (431546645134).

The spelling of 221304242012 in words is "two hundred twenty-one billion, three hundred four million, two hundred forty-two thousand, twelve".