130331021 has 2 divisors, whose sum is σ = 130331022. Its totient is φ = 130331020.

The previous prime is 130330957. The next prime is 130331039. The reversal of 130331021 is 120133031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86955625 + 43375396 = 9325^2 + 6586^2 .

It is a cyclic number.

It is not a de Polignac number, because 130331021 - 2⁶ = 130330957 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 130330987 and 130331005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130331921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65165510 + 65165511.

It is an arithmetic number, because the mean of its divisors is an integer number (65165511).

Almost surely, 2^130331021 is an apocalyptic number.

It is an amenable number.

130331021 is a deficient number, since it is larger than the sum of its proper divisors (1).

130331021 is an equidigital number, since it uses as much as digits as its factorization.

130331021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 130331021 is about 11416.2612531424. The cubic root of 130331021 is about 507.0093080414.

Adding to 130331021 its reverse (120133031), we get a palindrome (250464052).

The spelling of 130331021 in words is "one hundred thirty million, three hundred thirty-one thousand, twenty-one".