204123221242 has 16 divisors (see below), whose sum is σ = 308186783712. Its totient is φ = 101394511920.

The previous prime is 204123221233. The next prime is 204123221257. The reversal of 204123221242 is 242122321402.

204123221242 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1934017 + ... + 2036827.

It is an arithmetic number, because the mean of its divisors is an integer number (19261673982).

Almost surely, 2^204123221242 is an apocalyptic number.

204123221242 is a deficient number, since it is larger than the sum of its proper divisors (104063562470).

204123221242 is a wasteful number, since it uses less digits than its factorization.

204123221242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109293.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 204123221242 its reverse (242122321402), we get a palindrome (446245542644).

The spelling of 204123221242 in words is "two hundred four billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred forty-two".