204120344410123 has 2 divisors, whose sum is σ = 204120344410124. Its totient is φ = 204120344410122.

The previous prime is 204120344410121. The next prime is 204120344410141. The reversal of 204120344410123 is 321014443021402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204120344410123 - 2¹ = 204120344410121 is a prime.

Together with 204120344410121, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (204120344410121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102060172205061 + 102060172205062.

It is an arithmetic number, because the mean of its divisors is an integer number (102060172205062).

Almost surely, 2^{204120344410123} is an apocalyptic number.

204120344410123 is a deficient number, since it is larger than the sum of its proper divisors (1).

204120344410123 is an equidigital number, since it uses as much as digits as its factorization.

204120344410123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 204120344410123 its reverse (321014443021402), we get a palindrome (525134787431525).

The spelling of 204120344410123 in words is "two hundred four trillion, one hundred twenty billion, three hundred forty-four million, four hundred ten thousand, one hundred twenty-three".