220720211 has 2 divisors, whose sum is σ = 220720212. Its totient is φ = 220720210.

The previous prime is 220720153. The next prime is 220720229. The reversal of 220720211 is 112027022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220720211 - 2¹⁴ = 220703827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220720211.

It is not a weakly prime, because it can be changed into another prime (220720111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110360105 + 110360106.

It is an arithmetic number, because the mean of its divisors is an integer number (110360106).

Almost surely, 2^220720211 is an apocalyptic number.

220720211 is a deficient number, since it is larger than the sum of its proper divisors (1).

220720211 is an equidigital number, since it uses as much as digits as its factorization.

220720211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 220720211 is about 14856.6554446147. The cubic root of 220720211 is about 604.3391102991.

Adding to 220720211 its reverse (112027022), we get a palindrome (332747233).

The spelling of 220720211 in words is "two hundred twenty million, seven hundred twenty thousand, two hundred eleven".