2223224223221 has 4 divisors (see below), whose sum is σ = 2299887127500. Its totient is φ = 2146561318944.

The previous prime is 2223224223217. The next prime is 2223224223247. The reversal of 2223224223221 is 1223224223222.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1007034327121 + 1216189896100 = 1003511^2 + 1102810^2 .

It is a cyclic number.

It is not a de Polignac number, because 2223224223221 - 2² = 2223224223217 is a prime.

It is a super-2 number, since 2×2223224223221² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 76662904249 = 2223224223221 / (2 + 2 + 2 + 3 + 2 + 2 + 4 + 2 + 2 + 3 + 2 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223224223251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38331452096 + ... + 38331452153.

It is an arithmetic number, because the mean of its divisors is an integer number (574971781875).

Almost surely, 2^{2223224223221} is an apocalyptic number.

It is an amenable number.

2223224223221 is a deficient number, since it is larger than the sum of its proper divisors (76662904279).

2223224223221 is an equidigital number, since it uses as much as digits as its factorization.

2223224223221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76662904278.

The product of its digits is 18432, while the sum is 29.

Adding to 2223224223221 its reverse (1223224223222), we get a palindrome (3446448446443).

Subtracting from 2223224223221 its reverse (1223224223222), we obtain a palindrome (999999999999).

The spelling of 2223224223221 in words is "two trillion, two hundred twenty-three billion, two hundred twenty-four million, two hundred twenty-three thousand, two hundred twenty-one".