205512330120103 has 16 divisors (see below), whose sum is σ = 217547378088480. Its totient is φ = 193807357019136.

The previous prime is 205512330120077. The next prime is 205512330120121. The reversal of 205512330120103 is 301021033215502.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205512330120103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205512330120203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63229951 + ... + 66400687.

It is an arithmetic number, because the mean of its divisors is an integer number (13596711130530).

Almost surely, 2^{205512330120103} is an apocalyptic number.

205512330120103 is a deficient number, since it is larger than the sum of its proper divisors (12035047968377).

205512330120103 is a wasteful number, since it uses less digits than its factorization.

205512330120103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3222786.

The product of its (nonzero) digits is 5400, while the sum is 28.

Adding to 205512330120103 its reverse (301021033215502), we get a palindrome (506533363335605).

The spelling of 205512330120103 in words is "two hundred five trillion, five hundred twelve billion, three hundred thirty million, one hundred twenty thousand, one hundred three".