1220202211 has 8 divisors (see below), whose sum is σ = 1284932880. Its totient is φ = 1155522528.

The previous prime is 1220202209. The next prime is 1220202259. The reversal of 1220202211 is 1122020221.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1220202211 - 2¹ = 1220202209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1220202191 and 1220202200.

It is not an unprimeable number, because it can be changed into a prime (1220202281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42585 + ... + 65221.

It is an arithmetic number, because the mean of its divisors is an integer number (160616610).

Almost surely, 2^1220202211 is an apocalyptic number.

1220202211 is a deficient number, since it is larger than the sum of its proper divisors (64730669).

1220202211 is a wasteful number, since it uses less digits than its factorization.

1220202211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25493.

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

The square root of 1220202211 is about 34931.3929152560. The cubic root of 1220202211 is about 1068.5887619874.

Adding to 1220202211 its reverse (1122020221), we get a palindrome (2342222432).

The spelling of 1220202211 in words is "one billion, two hundred twenty million, two hundred two thousand, two hundred eleven".