2021122223 has 4 divisors (see below), whose sum is σ = 2021363520. Its totient is φ = 2020880928.

The previous prime is 2021122219. The next prime is 2021122241. The reversal of 2021122223 is 3222211202.

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 2021122223 - 2² = 2021122219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2021122823) 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, 107615 + ... + 124992.

It is an arithmetic number, because the mean of its divisors is an integer number (505340880).

Almost surely, 2^2021122223 is an apocalyptic number.

2021122223 is a deficient number, since it is larger than the sum of its proper divisors (241297).

2021122223 is an equidigital number, since it uses as much as digits as its factorization.

2021122223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241296.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 2021122223 is about 44956.8929420172. The cubic root of 2021122223 is about 1264.3409155520.

Adding to 2021122223 its reverse (3222211202), we get a palindrome (5243333425).

The spelling of 2021122223 in words is "two billion, twenty-one million, one hundred twenty-two thousand, two hundred twenty-three".