220320911 has 2 divisors, whose sum is σ = 220320912. Its totient is φ = 220320910.

The previous prime is 220320889. The next prime is 220320923. The reversal of 220320911 is 119023022.

220320911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220320911 - 2⁶ = 220320847 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220320931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110160455 + 110160456.

It is an arithmetic number, because the mean of its divisors is an integer number (110160456).

Almost surely, 2^220320911 is an apocalyptic number.

220320911 is a deficient number, since it is larger than the sum of its proper divisors (1).

220320911 is an equidigital number, since it uses as much as digits as its factorization.

220320911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 220320911 is about 14843.2109396855. The cubic root of 220320911 is about 603.9744581907.

Adding to 220320911 its reverse (119023022), we get a palindrome (339343933).

The spelling of 220320911 in words is "two hundred twenty million, three hundred twenty thousand, nine hundred eleven".