130712221 has 2 divisors, whose sum is σ = 130712222. Its totient is φ = 130712220.

The previous prime is 130712209. The next prime is 130712237. The reversal of 130712221 is 122217031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129640996 + 1071225 = 11386^2 + 1035^2 .

It is a cyclic number.

It is not a de Polignac number, because 130712221 - 2¹⁵ = 130679453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130712321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65356110 + 65356111.

It is an arithmetic number, because the mean of its divisors is an integer number (65356111).

Almost surely, 2^130712221 is an apocalyptic number.

It is an amenable number.

130712221 is a deficient number, since it is larger than the sum of its proper divisors (1).

130712221 is an equidigital number, since it uses as much as digits as its factorization.

130712221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 130712221 is about 11432.9445463538. The cubic root of 130712221 is about 507.5031373212.

Adding to 130712221 its reverse (122217031), we get a palindrome (252929252).

The spelling of 130712221 in words is "one hundred thirty million, seven hundred twelve thousand, two hundred twenty-one".