505105305433121 has 4 divisors (see below), whose sum is σ = 514635594214932. Its totient is φ = 495575016651312.

The previous prime is 505105305433109. The next prime is 505105305433123. The reversal of 505105305433121 is 121334503501505.

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

It can be written as a sum of positive squares in 2 ways, for example, as 253829261280400 + 251276044152721 = 15932020^2 + 15851689^2 .

It is a cyclic number.

It is not a de Polignac number, because 505105305433121 - 2²⁶ = 505105238324257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505105305433123) 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, 4765144390826 + ... + 4765144390931.

It is an arithmetic number, because the mean of its divisors is an integer number (128658898553733).

Almost surely, 2^{505105305433121} is an apocalyptic number.

It is an amenable number.

505105305433121 is a deficient number, since it is larger than the sum of its proper divisors (9530288781811).

505105305433121 is an equidigital number, since it uses as much as digits as its factorization.

505105305433121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9530288781810.

The product of its (nonzero) digits is 135000, while the sum is 38.

Adding to 505105305433121 its reverse (121334503501505), we get a palindrome (626439808934626).

The spelling of 505105305433121 in words is "five hundred five trillion, one hundred five billion, three hundred five million, four hundred thirty-three thousand, one hundred twenty-one".