220130221 has 4 divisors (see below), whose sum is σ = 220181500. Its totient is φ = 220078944.

The previous prime is 220130167. The next prime is 220130237. The reversal of 220130221 is 122031022.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 107536900 + 112593321 = 10370^2 + 10611^2 .

It is a cyclic number.

It is not a de Polignac number, because 220130221 - 2¹¹ = 220128173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220130291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18546 + ... + 28003.

It is an arithmetic number, because the mean of its divisors is an integer number (55045375).

Almost surely, 2^220130221 is an apocalyptic number.

It is an amenable number.

220130221 is a deficient number, since it is larger than the sum of its proper divisors (51279).

220130221 is an equidigital number, since it uses as much as digits as its factorization.

220130221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51278.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 220130221 is about 14836.7860738099. The cubic root of 220130221 is about 603.8001592066.

Adding to 220130221 its reverse (122031022), we get a palindrome (342161243).

The spelling of 220130221 in words is "two hundred twenty million, one hundred thirty thousand, two hundred twenty-one".