505501111101 has 16 divisors (see below), whose sum is σ = 781784236544. Its totient is φ = 284546466864.

The previous prime is 505501111033. The next prime is 505501111111. The reversal of 505501111101 is 101111105505.

It is not a de Polignac number, because 505501111101 - 2⁹ = 505501110589 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505501111111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 179636515 + ... + 179639328.

It is an arithmetic number, because the mean of its divisors is an integer number (48861514784).

Almost surely, 2^505501111101 is an apocalyptic number.

It is an amenable number.

505501111101 is a deficient number, since it is larger than the sum of its proper divisors (276283125443).

505501111101 is a wasteful number, since it uses less digits than its factorization.

505501111101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359275920.

The product of its (nonzero) digits is 125, while the sum is 21.

Adding to 505501111101 its reverse (101111105505), we get a palindrome (606612216606).

The spelling of 505501111101 in words is "five hundred five billion, five hundred one million, one hundred eleven thousand, one hundred one".