200404312123 has 4 divisors (see below), whose sum is σ = 200411783208. Its totient is φ = 200396841040.

The previous prime is 200404312117. The next prime is 200404312151. The reversal of 200404312123 is 321213404002.

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 200404312123 - 2²⁹ = 199867441211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 200404312094 and 200404312103.

It is not an unprimeable number, because it can be changed into a prime (200404112123) 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, 3695161 + ... + 3749002.

It is an arithmetic number, because the mean of its divisors is an integer number (50102945802).

Almost surely, 2^200404312123 is an apocalyptic number.

200404312123 is a deficient number, since it is larger than the sum of its proper divisors (7471085).

200404312123 is an equidigital number, since it uses as much as digits as its factorization.

200404312123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7471084.

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 200404312123 its reverse (321213404002), we get a palindrome (521617716125).

The spelling of 200404312123 in words is "two hundred billion, four hundred four million, three hundred twelve thousand, one hundred twenty-three".