204123221403 has 8 divisors (see below), whose sum is σ = 276777249600. Its totient is φ = 133775670408.

The previous prime is 204123221381. The next prime is 204123221473. The reversal of 204123221403 is 304122321402.

It is a happy number.

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

It is not a de Polignac number, because 204123221403 - 2¹⁴ = 204123205019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (204123221473) 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, 576619093 + ... + 576619446.

It is an arithmetic number, because the mean of its divisors is an integer number (34597156200).

Almost surely, 2^204123221403 is an apocalyptic number.

204123221403 is a deficient number, since it is larger than the sum of its proper divisors (72654028197).

204123221403 is a wasteful number, since it uses less digits than its factorization.

204123221403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1153238601.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 204123221403 its reverse (304122321402), we get a palindrome (508245542805).

Subtracting 204123221403 from its reverse (304122321402), we obtain a palindrome (99999099999).

The spelling of 204123221403 in words is "two hundred four billion, one hundred twenty-three million, two hundred twenty-one thousand, four hundred three".