201220133243 has 4 divisors (see below), whose sum is σ = 201233237808. Its totient is φ = 201207028680.

The previous prime is 201220133203. The next prime is 201220133287. The reversal of 201220133243 is 342331022102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201220133243 - 2¹⁰ = 201220132219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201220133203) 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 3 ways as a sum of consecutive naturals, for example, 6529223 + ... + 6559968.

It is an arithmetic number, because the mean of its divisors is an integer number (50308309452).

Almost surely, 2^201220133243 is an apocalyptic number.

201220133243 is a deficient number, since it is larger than the sum of its proper divisors (13104565).

201220133243 is a wasteful number, since it uses less digits than its factorization.

201220133243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13104564.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 201220133243 its reverse (342331022102), we get a palindrome (543551155345).

The spelling of 201220133243 in words is "two hundred one billion, two hundred twenty million, one hundred thirty-three thousand, two hundred forty-three".