201221020312 has 32 divisors (see below), whose sum is σ = 413198326800. Its totient is φ = 91297148544.

The previous prime is 201221020291. The next prime is 201221020327. The reversal of 201221020312 is 213020122102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16390623 + ... + 16402894.

Almost surely, 2^201221020312 is an apocalyptic number.

It is an amenable number.

201221020312 is an abundant number, since it is smaller than the sum of its proper divisors (211977306488).

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

201221020312 is a wasteful number, since it uses less digits than its factorization.

201221020312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32793595 (or 32793591 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 201221020312 its reverse (213020122102), we get a palindrome (414241142414).

The spelling of 201221020312 in words is "two hundred one billion, two hundred twenty-one million, twenty thousand, three hundred twelve".