130011221 has 2 divisors, whose sum is σ = 130011222. Its totient is φ = 130011220.

The previous prime is 130011209. The next prime is 130011251. The reversal of 130011221 is 122110031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127803025 + 2208196 = 11305^2 + 1486^2 .

It is a cyclic number.

It is not a de Polignac number, because 130011221 - 2¹⁰ = 130010197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (130011251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65005610 + 65005611.

It is an arithmetic number, because the mean of its divisors is an integer number (65005611).

Almost surely, 2^130011221 is an apocalyptic number.

It is an amenable number.

130011221 is a deficient number, since it is larger than the sum of its proper divisors (1).

130011221 is an equidigital number, since it uses as much as digits as its factorization.

130011221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 130011221 is about 11402.2463137752. The cubic root of 130011221 is about 506.5942766980.

Adding to 130011221 its reverse (122110031), we get a palindrome (252121252).

It can be divided in two parts, 1300 and 11221, that added together give a palindrome (12521).

The spelling of 130011221 in words is "one hundred thirty million, eleven thousand, two hundred twenty-one".