220021223 has 4 divisors (see below), whose sum is σ = 221138280. Its totient is φ = 218904168.

The previous prime is 220021183. The next prime is 220021253. The reversal of 220021223 is 322120022.

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

It is a cyclic number.

It is not a de Polignac number, because 220021223 - 2¹⁸ = 219759079 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220021198 and 220021207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021253) 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, 558233 + ... + 558626.

It is an arithmetic number, because the mean of its divisors is an integer number (55284570).

Almost surely, 2^220021223 is an apocalyptic number.

220021223 is a deficient number, since it is larger than the sum of its proper divisors (1117057).

220021223 is a wasteful number, since it uses less digits than its factorization.

220021223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117056.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 220021223 is about 14833.1123841222. The cubic root of 220021223 is about 603.7004850608.

Adding to 220021223 its reverse (322120022), we get a palindrome (542141245).

The spelling of 220021223 in words is "two hundred twenty million, twenty-one thousand, two hundred twenty-three".