130431216221 has 2 divisors, whose sum is σ = 130431216222. Its totient is φ = 130431216220.

The previous prime is 130431216121. The next prime is 130431216317. The reversal of 130431216221 is 122612134031.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128350944121 + 2080272100 = 358261^2 + 45610^2 .

It is a cyclic number.

It is not a de Polignac number, because 130431216221 - 2³⁰ = 129357474397 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130431216121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65215608110 + 65215608111.

It is an arithmetic number, because the mean of its divisors is an integer number (65215608111).

Almost surely, 2^130431216221 is an apocalyptic number.

It is an amenable number.

130431216221 is a deficient number, since it is larger than the sum of its proper divisors (1).

130431216221 is an equidigital number, since it uses as much as digits as its factorization.

130431216221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 130431216221 in words is "one hundred thirty billion, four hundred thirty-one million, two hundred sixteen thousand, two hundred twenty-one".