203221433212 has 72 divisors (see below), whose sum is σ = 428959888560. Its totient is φ = 83896404480.

The previous prime is 203221433203. The next prime is 203221433213. The reversal of 203221433212 is 212334122302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203221433213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2419887 + ... + 2502457.

It is an arithmetic number, because the mean of its divisors is an integer number (5957776230).

Almost surely, 2^203221433212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 203221433212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (214479944280).

203221433212 is an abundant number, since it is smaller than the sum of its proper divisors (225738455348).

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

203221433212 is a wasteful number, since it uses less digits than its factorization.

203221433212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83051 (or 83042 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 203221433212 its reverse (212334122302), we get a palindrome (415555555514).

The spelling of 203221433212 in words is "two hundred three billion, two hundred twenty-one million, four hundred thirty-three thousand, two hundred twelve".