2121224223 has 4 divisors (see below), whose sum is σ = 2828298968. Its totient is φ = 1414149480.

The previous prime is 2121224159. The next prime is 2121224269. The reversal of 2121224223 is 3224221212.

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

It is not a de Polignac number, because 2121224223 - 2⁶ = 2121224159 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 2121224223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121224123) 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, 353537368 + ... + 353537373.

It is an arithmetic number, because the mean of its divisors is an integer number (707074742).

Almost surely, 2^2121224223 is an apocalyptic number.

2121224223 is a deficient number, since it is larger than the sum of its proper divisors (707074745).

2121224223 is an equidigital number, since it uses as much as digits as its factorization.

2121224223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 707074744.

The product of its digits is 768, while the sum is 21.

The square root of 2121224223 is about 46056.7500264619. The cubic root of 2121224223 is about 1284.8788861713.

Adding to 2121224223 its reverse (3224221212), we get a palindrome (5345445435).

The spelling of 2121224223 in words is "two billion, one hundred twenty-one million, two hundred twenty-four thousand, two hundred twenty-three".