2021223223 has 4 divisors (see below), whose sum is σ = 2027807320. Its totient is φ = 2014639128.

The previous prime is 2021223131. The next prime is 2021223277. The reversal of 2021223223 is 3223221202.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2021223223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2021223223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021223623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3291588 + ... + 3292201.

It is an arithmetic number, because the mean of its divisors is an integer number (506951830).

Almost surely, 2^2021223223 is an apocalyptic number.

2021223223 is a deficient number, since it is larger than the sum of its proper divisors (6584097).

2021223223 is an equidigital number, since it uses as much as digits as its factorization.

2021223223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6584096.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 2021223223 is about 44958.0162262527. The cubic root of 2021223223 is about 1264.3619758494.

Adding to 2021223223 its reverse (3223221202), we get a palindrome (5244444425).

The spelling of 2021223223 in words is "two billion, twenty-one million, two hundred twenty-three thousand, two hundred twenty-three".