130221 has 32 divisors (see below), whose sum is σ = 241920. Its totient is φ = 67392.

The previous prime is 130211. The next prime is 130223. The reversal of 130221 is 122031.

It is a happy number.

It is not a de Polignac number, because 130221 - 2¹⁰ = 129197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2431 + ... + 2483.

It is an arithmetic number, because the mean of its divisors is an integer number (7560).

2¹³⁰²²¹ is an apocalyptic number.

It is an amenable number.

130221 is a deficient number, since it is larger than the sum of its proper divisors (111699).

130221 is a wasteful number, since it uses less digits than its factorization.

130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 76 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 130221 is about 360.8614692649. The cubic root of 130221 is about 50.6866601226.

Adding to 130221 its reverse (122031), we get a palindrome (252252).

It can be divided in two parts, 130 and 221, that added together give a triangular number (351 = T₂₆).

The spelling of 130221 in words is "one hundred thirty thousand, two hundred twenty-one".