201321243 has 6 divisors (see below), whose sum is σ = 290797364. Its totient is φ = 134214156.

The previous prime is 201321233. The next prime is 201321247. The reversal of 201321243 is 342123102.

It is not a de Polignac number, because 201321243 - 2⁹ = 201320731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201321247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11184505 + ... + 11184522.

Almost surely, 2^201321243 is an apocalyptic number.

201321243 is a deficient number, since it is larger than the sum of its proper divisors (89476121).

201321243 is a wasteful number, since it uses less digits than its factorization.

201321243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22369033 (or 22369030 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 201321243 is about 14188.7717227391. The cubic root of 201321243 is about 586.0885015451.

Adding to 201321243 its reverse (342123102), we get a palindrome (543444345).

The spelling of 201321243 in words is "two hundred one million, three hundred twenty-one thousand, two hundred forty-three".