220021211 has 8 divisors (see below), whose sum is σ = 227498544. Its totient is φ = 212644480.

The previous prime is 220021183. The next prime is 220021253. The reversal of 220021211 is 112120022.

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 a de Polignac number, because none of the positive numbers 2^k-220021211 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220021192 and 220021201.

It is not an unprimeable number, because it can be changed into a prime (220051211) 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, 20690 + ... + 29463.

It is an arithmetic number, because the mean of its divisors is an integer number (28437318).

Almost surely, 2^220021211 is an apocalyptic number.

220021211 is a deficient number, since it is larger than the sum of its proper divisors (7477333).

220021211 is a wasteful number, since it uses less digits than its factorization.

220021211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50301.

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

The square root of 220021211 is about 14833.1119796218. Note that the first 3 decimals coincide. The cubic root of 220021211 is about 603.7004740855.

Adding to 220021211 its reverse (112120022), we get a palindrome (332141233).

The spelling of 220021211 in words is "two hundred twenty million, twenty-one thousand, two hundred eleven".