201020113 has 4 divisors (see below), whose sum is σ = 229737280. Its totient is φ = 172302948.

The previous prime is 201020101. The next prime is 201020123. The reversal of 201020113 is 311020102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 311020102 = 2 ⋅155510051.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201020113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201020113.

It is not an unprimeable number, because it can be changed into a prime (201020123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14358573 + ... + 14358586.

It is an arithmetic number, because the mean of its divisors is an integer number (57434320).

Almost surely, 2^201020113 is an apocalyptic number.

It is an amenable number.

201020113 is a deficient number, since it is larger than the sum of its proper divisors (28717167).

201020113 is an equidigital number, since it uses as much as digits as its factorization.

201020113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28717166.

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 201020113 is about 14178.1561918326. The cubic root of 201020113 is about 585.7961381288.

Adding to 201020113 its reverse (311020102), we get a palindrome (512040215).

The spelling of 201020113 in words is "two hundred one million, twenty thousand, one hundred thirteen".