130421321 has 2 divisors, whose sum is σ = 130421322. Its totient is φ = 130421320.

The previous prime is 130421281. The next prime is 130421341. The reversal of 130421321 is 123124031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67059721 + 63361600 = 8189^2 + 7960^2 .

It is an emirp because it is prime and its reverse (123124031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130421321 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130421321.

It is not a weakly prime, because it can be changed into another prime (130421341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65210660 + 65210661.

It is an arithmetic number, because the mean of its divisors is an integer number (65210661).

Almost surely, 2^130421321 is an apocalyptic number.

It is an amenable number.

130421321 is a deficient number, since it is larger than the sum of its proper divisors (1).

130421321 is an equidigital number, since it uses as much as digits as its factorization.

130421321 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 17.

The square root of 130421321 is about 11420.2154533091. The cubic root of 130421321 is about 507.1263750058.

Adding to 130421321 its reverse (123124031), we get a palindrome (253545352).

The spelling of 130421321 in words is "one hundred thirty million, four hundred twenty-one thousand, three hundred twenty-one".