201330311221 has 16 divisors (see below), whose sum is σ = 221725744128. Its totient is φ = 181646640000.

The previous prime is 201330311213. The next prime is 201330311227. The reversal of 201330311221 is 122113033102.

It is a cyclic number.

It is not a de Polignac number, because 201330311221 - 2³ = 201330311213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201330311227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239481 + ... + 678241.

It is an arithmetic number, because the mean of its divisors is an integer number (13857859008).

Almost surely, 2^201330311221 is an apocalyptic number.

It is an amenable number.

201330311221 is a deficient number, since it is larger than the sum of its proper divisors (20395432907).

201330311221 is a wasteful number, since it uses less digits than its factorization.

201330311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439572.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 201330311221 its reverse (122113033102), we get a palindrome (323443344323).

The spelling of 201330311221 in words is "two hundred one billion, three hundred thirty million, three hundred eleven thousand, two hundred twenty-one".