130026821 has 2 divisors, whose sum is σ = 130026822. Its totient is φ = 130026820.

The previous prime is 130026781. The next prime is 130026839. The reversal of 130026821 is 128620031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82264900 + 47761921 = 9070^2 + 6911^2 .

It is an emirp because it is prime and its reverse (128620031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130026821 - 2²⁶ = 62917957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130026881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65013410 + 65013411.

It is an arithmetic number, because the mean of its divisors is an integer number (65013411).

Almost surely, 2^130026821 is an apocalyptic number.

It is an amenable number.

130026821 is a deficient number, since it is larger than the sum of its proper divisors (1).

130026821 is an equidigital number, since it uses as much as digits as its factorization.

130026821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 130026821 is about 11402.9303689885. The cubic root of 130026821 is about 506.6145379098.

Adding to 130026821 its reverse (128620031), we get a palindrome (258646852).

The spelling of 130026821 in words is "one hundred thirty million, twenty-six thousand, eight hundred twenty-one".