130521310421 has 2 divisors, whose sum is σ = 130521310422. Its totient is φ = 130521310420.

The previous prime is 130521310391. The next prime is 130521310427. The reversal of 130521310421 is 124013125031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73177824196 + 57343486225 = 270514^2 + 239465^2 .

It is a cyclic number.

It is not a de Polignac number, because 130521310421 - 2⁶ = 130521310357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130521310427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65260655210 + 65260655211.

It is an arithmetic number, because the mean of its divisors is an integer number (65260655211).

Almost surely, 2^130521310421 is an apocalyptic number.

It is an amenable number.

130521310421 is a deficient number, since it is larger than the sum of its proper divisors (1).

130521310421 is an equidigital number, since it uses as much as digits as its factorization.

130521310421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 23.

Adding to 130521310421 its reverse (124013125031), we get a palindrome (254534435452).

The spelling of 130521310421 in words is "one hundred thirty billion, five hundred twenty-one million, three hundred ten thousand, four hundred twenty-one".