201040402123 has 8 divisors (see below), whose sum is σ = 220418899200. Its totient is φ = 181845587880.

The previous prime is 201040402099. The next prime is 201040402183. The reversal of 201040402123 is 321204040102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-201040402123 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 201040402123.

It is not an unprimeable number, because it can be changed into a prime (201040402183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45918415 + ... + 45922792.

It is an arithmetic number, because the mean of its divisors is an integer number (27552362400).

Almost surely, 2^201040402123 is an apocalyptic number.

201040402123 is a deficient number, since it is larger than the sum of its proper divisors (19378497077).

201040402123 is a wasteful number, since it uses less digits than its factorization.

201040402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91841417.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 201040402123 its reverse (321204040102), we get a palindrome (522244442225).

The spelling of 201040402123 in words is "two hundred one billion, forty million, four hundred two thousand, one hundred twenty-three".