201243321 has 12 divisors (see below), whose sum is σ = 293353060. Its totient is φ = 132930720.

The previous prime is 201243313. The next prime is 201243347. The reversal of 201243321 is 123342102.

It can be written as a sum of positive squares in 2 ways, for example, as 80353296 + 120890025 = 8964^2 + 10995^2 .

It is not a de Polignac number, because 201243321 - 2³ = 201243313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201243294 and 201243303.

It is not an unprimeable number, because it can be changed into a prime (201243391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101590 + ... + 103551.

Almost surely, 2^201243321 is an apocalyptic number.

It is an amenable number.

201243321 is a deficient number, since it is larger than the sum of its proper divisors (92109739).

201243321 is a wasteful number, since it uses less digits than its factorization.

201243321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205256 (or 205253 counting only the distinct ones).

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

The square root of 201243321 is about 14186.0255533395. The cubic root of 201243321 is about 586.0128760076.

Adding to 201243321 its reverse (123342102), we get a palindrome (324585423).

The spelling of 201243321 in words is "two hundred one million, two hundred forty-three thousand, three hundred twenty-one".