201023113 has 4 divisors (see below), whose sum is σ = 212848020. Its totient is φ = 189198208.

The previous prime is 201023111. The next prime is 201023131. The reversal of 201023113 is 311320102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 311320102 = 2 ⋅155660051.

It can be written as a sum of positive squares in 2 ways, for example, as 169078009 + 31945104 = 13003^2 + 5652^2 .

It is a cyclic number.

It is not a de Polignac number, because 201023113 - 2¹ = 201023111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201023093 and 201023102.

It is not an unprimeable number, because it can be changed into a prime (201023111) 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, 5912428 + ... + 5912461.

It is an arithmetic number, because the mean of its divisors is an integer number (53212005).

Almost surely, 2^201023113 is an apocalyptic number.

It is an amenable number.

201023113 is a deficient number, since it is larger than the sum of its proper divisors (11824907).

201023113 is a wasteful number, since it uses less digits than its factorization.

201023113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11824906.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 201023113 is about 14178.2619879871. The cubic root of 201023113 is about 585.7990522313.

Adding to 201023113 its reverse (311320102), we get a palindrome (512343215).

It can be divided in two parts, 20102 and 3113, that multiplied together give a palindrome (62577526).

The spelling of 201023113 in words is "two hundred one million, twenty-three thousand, one hundred thirteen".