201324312221 has 16 divisors (see below), whose sum is σ = 205606840320. Its totient is φ = 197074510080.

The previous prime is 201324312109. The next prime is 201324312229. The reversal of 201324312221 is 122213423102.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201324312221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201324312229) 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, 32172725 + ... + 32178981.

It is an arithmetic number, because the mean of its divisors is an integer number (12850427520).

Almost surely, 2^201324312221 is an apocalyptic number.

It is an amenable number.

201324312221 is a deficient number, since it is larger than the sum of its proper divisors (4282528099).

201324312221 is a wasteful number, since it uses less digits than its factorization.

201324312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 201324312221 its reverse (122213423102), we get a palindrome (323537735323).

The spelling of 201324312221 in words is "two hundred one billion, three hundred twenty-four million, three hundred twelve thousand, two hundred twenty-one".