201221020321312 has 96 divisors (see below), whose sum is σ = 419769203817600. Its totient is φ = 94621803859968.

The previous prime is 201221020321301. The next prime is 201221020321313. The reversal of 201221020321312 is 213123020122102.

It is not an unprimeable number, because it can be changed into a prime (201221020321313) 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, 4312194493 + ... + 4312241155.

It is an arithmetic number, because the mean of its divisors is an integer number (4372595873100).

Almost surely, 2^{201221020321312} is an apocalyptic number.

It is an amenable number.

201221020321312 is an abundant number, since it is smaller than the sum of its proper divisors (218548183496288).

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

201221020321312 is a wasteful number, since it uses less digits than its factorization.

201221020321312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52418 (or 52410 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 201221020321312 its reverse (213123020122102), we get a palindrome (414344040443414).

The spelling of 201221020321312 in words is "two hundred one trillion, two hundred twenty-one billion, twenty million, three hundred twenty-one thousand, three hundred twelve".