201004123 has 4 divisors (see below), whose sum is σ = 201149200. Its totient is φ = 200859048.

The previous prime is 201004109. The next prime is 201004157. The reversal of 201004123 is 321400102.

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 201004123 - 2¹⁷ = 200873051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201004163) 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, 70440 + ... + 73237.

It is an arithmetic number, because the mean of its divisors is an integer number (50287300).

Almost surely, 2^201004123 is an apocalyptic number.

201004123 is a deficient number, since it is larger than the sum of its proper divisors (145077).

201004123 is a wasteful number, since it uses less digits than its factorization.

201004123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145076.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 201004123 is about 14177.5922850109. The cubic root of 201004123 is about 585.7806054730.

Adding to 201004123 its reverse (321400102), we get a palindrome (522404225).

The spelling of 201004123 in words is "two hundred one million, four thousand, one hundred twenty-three".