130021221 has 16 divisors (see below), whose sum is σ = 189462528. Its totient is φ = 78658800.

The previous prime is 130021153. The next prime is 130021259. The reversal of 130021221 is 122120031.

It is not a de Polignac number, because 130021221 - 2¹¹ = 130019173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130021197 and 130021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130021271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16786 + ... + 23276.

It is an arithmetic number, because the mean of its divisors is an integer number (11841408).

Almost surely, 2^130021221 is an apocalyptic number.

130021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130021221 is a deficient number, since it is larger than the sum of its proper divisors (59441307).

130021221 is a wasteful number, since it uses less digits than its factorization.

130021221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7112.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 130021221 is about 11402.6848154283. The cubic root of 130021221 is about 506.6072648408.

Adding to 130021221 its reverse (122120031), we get a palindrome (252141252).

The spelling of 130021221 in words is "one hundred thirty million, twenty-one thousand, two hundred twenty-one".