220560121 has 2 divisors, whose sum is σ = 220560122. Its totient is φ = 220560120.

The previous prime is 220560107. The next prime is 220560149. The reversal of 220560121 is 121065022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197711721 + 22848400 = 14061^2 + 4780^2 .

It is a cyclic number.

It is not a de Polignac number, because 220560121 - 2⁵ = 220560089 is a prime.

It is not a weakly prime, because it can be changed into another prime (220560191) 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, 110280060 + 110280061.

It is an arithmetic number, because the mean of its divisors is an integer number (110280061).

Almost surely, 2^220560121 is an apocalyptic number.

It is an amenable number.

220560121 is a deficient number, since it is larger than the sum of its proper divisors (1).

220560121 is an equidigital number, since it uses as much as digits as its factorization.

220560121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 220560121 is about 14851.2666463167. The cubic root of 220560121 is about 604.1929644191.

It can be divided in two parts, 2205 and 60121, that added together give a palindrome (62326).

The spelling of 220560121 in words is "two hundred twenty million, five hundred sixty thousand, one hundred twenty-one".