505340508121 has 4 divisors (see below), whose sum is σ = 505662177744. Its totient is φ = 505018838500.

The previous prime is 505340508073. The next prime is 505340508173. The reversal of 505340508121 is 121805043505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-505340508121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505340508221) 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, 160832455 + ... + 160835596.

It is an arithmetic number, because the mean of its divisors is an integer number (126415544436).

Almost surely, 2^505340508121 is an apocalyptic number.

It is an amenable number.

505340508121 is a deficient number, since it is larger than the sum of its proper divisors (321669623).

505340508121 is a wasteful number, since it uses less digits than its factorization.

505340508121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321669622.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 505340508121 in words is "five hundred five billion, three hundred forty million, five hundred eight thousand, one hundred twenty-one".