505112332455221 has 4 divisors (see below), whose sum is σ = 510787751921100. Its totient is φ = 499436912989344.

The previous prime is 505112332455167. The next prime is 505112332455257. The reversal of 505112332455221 is 122554233211505.

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 213603661814596 + 291508670640625 = 14615186^2 + 17073625^2 .

It is a cyclic number.

It is not a de Polignac number, because 505112332455221 - 2²⁶ = 505112265346357 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 (505112332455421) 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, 2837709732806 + ... + 2837709732983.

It is an arithmetic number, because the mean of its divisors is an integer number (127696937980275).

Almost surely, 2^{505112332455221} is an apocalyptic number.

It is an amenable number.

505112332455221 is a deficient number, since it is larger than the sum of its proper divisors (5675419465879).

505112332455221 is an equidigital number, since it uses as much as digits as its factorization.

505112332455221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5675419465878.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 505112332455221 its reverse (122554233211505), we get a palindrome (627666565666726).

The spelling of 505112332455221 in words is "five hundred five trillion, one hundred twelve billion, three hundred thirty-two million, four hundred fifty-five thousand, two hundred twenty-one".