220221023 has 4 divisors (see below), whose sum is σ = 240241128. Its totient is φ = 200200920.

The previous prime is 220221019. The next prime is 220221031. The reversal of 220221023 is 320122022.

220221023 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 220221023 - 2² = 220221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220220989 and 220221007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221073) 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, 10010036 + ... + 10010057.

It is an arithmetic number, because the mean of its divisors is an integer number (60060282).

Almost surely, 2^220221023 is an apocalyptic number.

220221023 is a deficient number, since it is larger than the sum of its proper divisors (20020105).

220221023 is a wasteful number, since it uses less digits than its factorization.

220221023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20020104.

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

The square root of 220221023 is about 14839.8457876084. The cubic root of 220221023 is about 603.8831687468.

Adding to 220221023 its reverse (320122022), we get a palindrome (540343045).

Subtracting 220221023 from its reverse (320122022), we obtain a palindrome (99900999).

The spelling of 220221023 in words is "two hundred twenty million, two hundred twenty-one thousand, twenty-three".