204123031112242 has 16 divisors (see below), whose sum is σ = 340321760278272. Its totient is φ = 91032569620720.

The previous prime is 204123031112237. The next prime is 204123031112249. The reversal of 204123031112242 is 242211130321402.

It is a self number, because there is not a number n which added to its sum of digits gives 204123031112242.

It is not an unprimeable number, because it can be changed into a prime (204123031112249) 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, 87531315778 + ... + 87531318109.

It is an arithmetic number, because the mean of its divisors is an integer number (21270110017392).

Almost surely, 2^{204123031112242} is an apocalyptic number.

204123031112242 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

204123031112242 is a deficient number, since it is larger than the sum of its proper divisors (136198729166030).

204123031112242 is a wasteful number, since it uses less digits than its factorization.

204123031112242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175062633953.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 204123031112242 its reverse (242211130321402), we get a palindrome (446334161433644).

The spelling of 204123031112242 in words is "two hundred four trillion, one hundred twenty-three billion, thirty-one million, one hundred twelve thousand, two hundred forty-two".