130811321 has 2 divisors, whose sum is σ = 130811322. Its totient is φ = 130811320.

The previous prime is 130811287. The next prime is 130811357. The reversal of 130811321 is 123118031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92371321 + 38440000 = 9611^2 + 6200^2 .

It is a cyclic number.

It is not a de Polignac number, because 130811321 - 2²² = 126617017 is a prime.

It is a super-2 number, since 2×130811321² = 34223203403530082, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 130811293 and 130811302.

It is not a weakly prime, because it can be changed into another prime (130811521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65405660 + 65405661.

It is an arithmetic number, because the mean of its divisors is an integer number (65405661).

Almost surely, 2^130811321 is an apocalyptic number.

It is an amenable number.

130811321 is a deficient number, since it is larger than the sum of its proper divisors (1).

130811321 is an equidigital number, since it uses as much as digits as its factorization.

130811321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 130811321 is about 11437.2776918286. The cubic root of 130811321 is about 507.6313601091.

Adding to 130811321 its reverse (123118031), we get a palindrome (253929352).

The spelling of 130811321 in words is "one hundred thirty million, eight hundred eleven thousand, three hundred twenty-one".