201123023 has 4 divisors (see below), whose sum is σ = 201212880. Its totient is φ = 201033168.

The previous prime is 201122989. The next prime is 201123059. The reversal of 201123023 is 320321102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201123023 - 2⁶ = 201122959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201122989 and 201123007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201128023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41483 + ... + 46076.

It is an arithmetic number, because the mean of its divisors is an integer number (50303220).

Almost surely, 2^201123023 is an apocalyptic number.

201123023 is a deficient number, since it is larger than the sum of its proper divisors (89857).

201123023 is an equidigital number, since it uses as much as digits as its factorization.

201123023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89856.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 201123023 is about 14181.7849017675. The cubic root of 201123023 is about 585.8960850036.

Adding to 201123023 its reverse (320321102), we get a palindrome (521444125).

The spelling of 201123023 in words is "two hundred one million, one hundred twenty-three thousand, twenty-three".