201423123 has 48 divisors (see below), whose sum is σ = 353808000. Its totient is φ = 108829440.

The previous prime is 201423097. The next prime is 201423127. The reversal of 201423123 is 321324102.

It is not a de Polignac number, because 201423123 - 2⁵ = 201423091 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201423096 and 201423105.

It is not an unprimeable number, because it can be changed into a prime (201423127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28828 + ... + 35126.

It is an arithmetic number, because the mean of its divisors is an integer number (7371000).

Almost surely, 2^201423123 is an apocalyptic number.

201423123 is a deficient number, since it is larger than the sum of its proper divisors (152384877).

201423123 is a wasteful number, since it uses less digits than its factorization.

201423123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6352 (or 6349 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 201423123 is about 14192.3614314180. The cubic root of 201423123 is about 586.1873495788.

Adding to 201423123 its reverse (321324102), we get a palindrome (522747225).

It can be divided in two parts, 201 and 423123, that added together give a palindrome (423324).

The spelling of 201423123 in words is "two hundred one million, four hundred twenty-three thousand, one hundred twenty-three".