201040321 has 4 divisors (see below), whose sum is σ = 203794372. Its totient is φ = 198286272.

The previous prime is 201040319. The next prime is 201040327. The reversal of 201040321 is 123040102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123040102 = 2 ⋅61520051.

It can be written as a sum of positive squares in 2 ways, for example, as 56175025 + 144865296 = 7495^2 + 12036^2 .

It is a cyclic number.

It is not a de Polignac number, because 201040321 - 2¹ = 201040319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201040327) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1376916 + ... + 1377061.

It is an arithmetic number, because the mean of its divisors is an integer number (50948593).

Almost surely, 2^201040321 is an apocalyptic number.

It is an amenable number.

201040321 is a deficient number, since it is larger than the sum of its proper divisors (2754051).

201040321 is an equidigital number, since it uses as much as digits as its factorization.

201040321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2754050.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201040321 is about 14178.8688194792. The cubic root of 201040321 is about 585.8157669635.

Adding to 201040321 its reverse (123040102), we get a palindrome (324080423).

The spelling of 201040321 in words is "two hundred one million, forty thousand, three hundred twenty-one".