221303202312 has 64 divisors (see below), whose sum is σ = 554658192000. Its totient is φ = 73581261824.

The previous prime is 221303202299. The next prime is 221303202371. The reversal of 221303202312 is 213202303122.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18766114 + ... + 18777902.

It is an arithmetic number, because the mean of its divisors is an integer number (8666534250).

Almost surely, 2^221303202312 is an apocalyptic number.

It is an amenable number.

221303202312 is an abundant number, since it is smaller than the sum of its proper divisors (333354989688).

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

221303202312 is a wasteful number, since it uses less digits than its factorization.

221303202312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13710 (or 13706 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 221303202312 its reverse (213202303122), we get a palindrome (434505505434).

The spelling of 221303202312 in words is "two hundred twenty-one billion, three hundred three million, two hundred two thousand, three hundred twelve".