220021111209 has 4 divisors (see below), whose sum is σ = 293361481616. Its totient is φ = 146680740804.

The previous prime is 220021111207. The next prime is 220021111217. The reversal of 220021111209 is 902111120022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 220021111209 - 2¹ = 220021111207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220021111207) 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, 36670185199 + ... + 36670185204.

It is an arithmetic number, because the mean of its divisors is an integer number (73340370404).

Almost surely, 2^220021111209 is an apocalyptic number.

It is an amenable number.

220021111209 is a deficient number, since it is larger than the sum of its proper divisors (73340370407).

220021111209 is an equidigital number, since it uses as much as digits as its factorization.

220021111209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73340370406.

The product of its (nonzero) digits is 144, while the sum is 21.

The spelling of 220021111209 in words is "two hundred twenty billion, twenty-one million, one hundred eleven thousand, two hundred nine".