220341221 has 2 divisors, whose sum is σ = 220341222. Its totient is φ = 220341220.

The previous prime is 220341203. The next prime is 220341227. The reversal of 220341221 is 122143022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 102292996 = 10865^2 + 10114^2 .

It is a cyclic number.

It is not a de Polignac number, because 220341221 - 2¹⁴ = 220324837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 220341221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220341227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110170610 + 110170611.

It is an arithmetic number, because the mean of its divisors is an integer number (110170611).

Almost surely, 2^220341221 is an apocalyptic number.

It is an amenable number.

220341221 is a deficient number, since it is larger than the sum of its proper divisors (1).

220341221 is an equidigital number, since it uses as much as digits as its factorization.

220341221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 220341221 is about 14843.8950750805. The cubic root of 220341221 is about 603.9930164902.

Adding to 220341221 its reverse (122143022), we get a palindrome (342484243).

The spelling of 220341221 in words is "two hundred twenty million, three hundred forty-one thousand, two hundred twenty-one".