1220220211 has 8 divisors (see below), whose sum is σ = 1442625120. Its totient is φ = 1009837248.

The previous prime is 1220220193. The next prime is 1220220227. The reversal of 1220220211 is 1120220221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1220220211 - 2⁷ = 1220220083 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220220191 and 1220220200.

It is not an unprimeable number, because it can be changed into a prime (1220220511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3005266 + ... + 3005671.

It is an arithmetic number, because the mean of its divisors is an integer number (180328140).

Almost surely, 2^1220220211 is an apocalyptic number.

1220220211 is a deficient number, since it is larger than the sum of its proper divisors (222404909).

1220220211 is an equidigital number, since it uses as much as digits as its factorization.

1220220211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010973.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1220220211 is about 34931.6505622050. The cubic root of 1220220211 is about 1068.5940164452.

Adding to 1220220211 its reverse (1120220221), we get a palindrome (2340440432).

The spelling of 1220220211 in words is "one billion, two hundred twenty million, two hundred twenty thousand, two hundred eleven".