506134421161321 has 2 divisors, whose sum is σ = 506134421161322. Its totient is φ = 506134421161320.

The previous prime is 506134421161309. The next prime is 506134421161409. The reversal of 506134421161321 is 123161124431605.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481243551805696 + 24890869355625 = 21937264^2 + 4989075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-506134421161321 is a prime.

It is not a weakly prime, because it can be changed into another prime (506134421161021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 253067210580660 + 253067210580661.

It is an arithmetic number, because the mean of its divisors is an integer number (253067210580661).

Almost surely, 2^{506134421161321} is an apocalyptic number.

It is an amenable number.

506134421161321 is a deficient number, since it is larger than the sum of its proper divisors (1).

506134421161321 is an equidigital number, since it uses as much as digits as its factorization.

506134421161321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

Adding to 506134421161321 its reverse (123161124431605), we get a palindrome (629295545592926).

The spelling of 506134421161321 in words is "five hundred six trillion, one hundred thirty-four billion, four hundred twenty-one million, one hundred sixty-one thousand, three hundred twenty-one".