201044423123 has 4 divisors (see below), whose sum is σ = 201046220688. Its totient is φ = 201042625560.

The previous prime is 201044423087. The next prime is 201044423137. The reversal of 201044423123 is 321324440102.

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 201044423123 - 2²⁶ = 200977314259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201044423092 and 201044423101.

It is not an unprimeable number, because it can be changed into a prime (201044423323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 719036 + ... + 958697.

It is an arithmetic number, because the mean of its divisors is an integer number (50261555172).

Almost surely, 2^201044423123 is an apocalyptic number.

201044423123 is a deficient number, since it is larger than the sum of its proper divisors (1797565).

201044423123 is a wasteful number, since it uses less digits than its factorization.

201044423123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797564.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 201044423123 its reverse (321324440102), we get a palindrome (522368863225).

The spelling of 201044423123 in words is "two hundred one billion, forty-four million, four hundred twenty-three thousand, one hundred twenty-three".