1220200211 has 4 divisors (see below), whose sum is σ = 1291976712. Its totient is φ = 1148423712.

The previous prime is 1220200193. The next prime is 1220200217. The reversal of 1220200211 is 1120020221.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1220200211 - 2⁶ = 1220200147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220200192 and 1220200201.

It is not an unprimeable number, because it can be changed into a prime (1220200217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35888225 + ... + 35888258.

It is an arithmetic number, because the mean of its divisors is an integer number (322994178).

Almost surely, 2^1220200211 is an apocalyptic number.

1220200211 is a deficient number, since it is larger than the sum of its proper divisors (71776501).

1220200211 is an equidigital number, since it uses as much as digits as its factorization.

1220200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71776500.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1220200211 is about 34931.3642877000. The cubic root of 1220200211 is about 1068.5881781555.

Adding to 1220200211 its reverse (1120020221), we get a palindrome (2340220432).

The spelling of 1220200211 in words is "one billion, two hundred twenty million, two hundred thousand, two hundred eleven".