201221032312 has 16 divisors (see below), whose sum is σ = 397146774600. Its totient is φ = 95315225760.

The previous prime is 201221032297. The next prime is 201221032379. The reversal of 201221032312 is 213230122102.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a self number, because there is not a number n which added to its sum of digits gives 201221032312.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661911139 + ... + 661911442.

Almost surely, 2^201221032312 is an apocalyptic number.

It is an amenable number.

201221032312 is a deficient number, since it is larger than the sum of its proper divisors (195925742288).

201221032312 is a wasteful number, since it uses less digits than its factorization.

201221032312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323822606 (or 1323822602 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 201221032312 its reverse (213230122102), we get a palindrome (414451154414).

The spelling of 201221032312 in words is "two hundred one billion, two hundred twenty-one million, thirty-two thousand, three hundred twelve".