505111101103 has 4 divisors (see below), whose sum is σ = 577269829840. Its totient is φ = 432952372368.

The previous prime is 505111101101. The next prime is 505111101113. The reversal of 505111101103 is 301101111505.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505111101103 - 2¹ = 505111101101 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 (505111101101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36079364358 + ... + 36079364371.

It is an arithmetic number, because the mean of its divisors is an integer number (144317457460).

Almost surely, 2^505111101103 is an apocalyptic number.

505111101103 is a deficient number, since it is larger than the sum of its proper divisors (72158728737).

505111101103 is an equidigital number, since it uses as much as digits as its factorization.

505111101103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72158728736.

The product of its (nonzero) digits is 75, while the sum is 19.

Adding to 505111101103 its reverse (301101111505), we get a palindrome (806212212608).

The spelling of 505111101103 in words is "five hundred five billion, one hundred eleven million, one hundred one thousand, one hundred three".