201123113 has 4 divisors (see below), whose sum is σ = 211708560. Its totient is φ = 190537668.

The previous prime is 201123101. The next prime is 201123127. The reversal of 201123113 is 311321102.

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.

It is a cyclic number.

It is not a de Polignac number, because 201123113 - 2¹⁸ = 200860969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201123313) 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, 5292695 + ... + 5292732.

It is an arithmetic number, because the mean of its divisors is an integer number (52927140).

Almost surely, 2^201123113 is an apocalyptic number.

It is an amenable number.

201123113 is a deficient number, since it is larger than the sum of its proper divisors (10585447).

201123113 is a wasteful number, since it uses less digits than its factorization.

201123113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10585446.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 201123113 is about 14181.7880748515. The cubic root of 201123113 is about 585.8961723973.

Adding to 201123113 its reverse (311321102), we get a palindrome (512444215).

The spelling of 201123113 in words is "two hundred one million, one hundred twenty-three thousand, one hundred thirteen".