222232444232221 has 4 divisors (see below), whose sum is σ = 222233091990844. Its totient is φ = 222231796473600.

The previous prime is 222232444232209. The next prime is 222232444232261. The reversal of 222232444232221 is 122232444232222.

It is a happy number.

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 156920993829721 + 65311450402500 = 12526811^2 + 8081550^2 .

It is a cyclic number.

It is not a de Polignac number, because 222232444232221 - 2¹⁹ = 222232443707933 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 (222232444232261) 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, 323364420 + ... + 324050941.

It is an arithmetic number, because the mean of its divisors is an integer number (55558272997711).

Almost surely, 2^{222232444232221} is an apocalyptic number.

It is an amenable number.

222232444232221 is a deficient number, since it is larger than the sum of its proper divisors (647758623).

222232444232221 is an equidigital number, since it uses as much as digits as its factorization.

222232444232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647758622.

The product of its digits is 294912, while the sum is 37.

Adding to 222232444232221 its reverse (122232444232222), we get a palindrome (344464888464443).

Subtracting from 222232444232221 its reverse (122232444232222), we obtain a palindrome (99999999999999).

The spelling of 222232444232221 in words is "two hundred twenty-two trillion, two hundred thirty-two billion, four hundred forty-four million, two hundred thirty-two thousand, two hundred twenty-one".