221211203303312 has 20 divisors (see below), whose sum is σ = 428651945293440. Its totient is φ = 110591346453408.

The previous prime is 221211203303303. The next prime is 221211203303317. The reversal of 221211203303312 is 213303302112122.

221211203303312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (221211203303317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 890821868 + ... + 891070155.

It is an arithmetic number, because the mean of its divisors is an integer number (21432597264672).

Almost surely, 2^{221211203303312} is an apocalyptic number.

It is an amenable number.

221211203303312 is a deficient number, since it is larger than the sum of its proper divisors (207440741990128).

221211203303312 is a wasteful number, since it uses less digits than its factorization.

221211203303312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1781899790 (or 1781899784 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

Adding to 221211203303312 its reverse (213303302112122), we get a palindrome (434514505415434).

The spelling of 221211203303312 in words is "two hundred twenty-one trillion, two hundred eleven billion, two hundred three million, three hundred three thousand, three hundred twelve".