130768021 has 2 divisors, whose sum is σ = 130768022. Its totient is φ = 130768020.

The previous prime is 130768019. The next prime is 130768049. The reversal of 130768021 is 120867031.

It is an a-pointer prime, because the next prime (130768049) can be obtained adding 130768021 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124567921 + 6200100 = 11161^2 + 2490^2 .

It is an emirp because it is prime and its reverse (120867031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130768021 - 2¹ = 130768019 is a prime.

Together with 130768019, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130768061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65384010 + 65384011.

It is an arithmetic number, because the mean of its divisors is an integer number (65384011).

Almost surely, 2^130768021 is an apocalyptic number.

It is an amenable number.

130768021 is a deficient number, since it is larger than the sum of its proper divisors (1).

130768021 is an equidigital number, since it uses as much as digits as its factorization.

130768021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 130768021 is about 11435.3846021898. The cubic root of 130768021 is about 507.5753433886.

The spelling of 130768021 in words is "one hundred thirty million, seven hundred sixty-eight thousand, twenty-one".