220023021 has 16 divisors (see below), whose sum is σ = 309528000. Its totient is φ = 138636288.

The previous prime is 220023019. The next prime is 220023031. The reversal of 220023021 is 120320022.

It is not a de Polignac number, because 220023021 - 2¹ = 220023019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 220022988 and 220023006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220023031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21295 + ... + 29891.

It is an arithmetic number, because the mean of its divisors is an integer number (19345500).

Almost surely, 2^220023021 is an apocalyptic number.

It is an amenable number.

220023021 is a deficient number, since it is larger than the sum of its proper divisors (89504979).

220023021 is a wasteful number, since it uses less digits than its factorization.

220023021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9068.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 220023021 is about 14833.1729916428. The cubic root of 220023021 is about 603.7021295241.

Adding to 220023021 its reverse (120320022), we get a palindrome (340343043).

The spelling of 220023021 in words is "two hundred twenty million, twenty-three thousand, twenty-one".