222405221321 has 4 divisors (see below), whose sum is σ = 222523965972. Its totient is φ = 222286476672.

The previous prime is 222405221317. The next prime is 222405221341. The reversal of 222405221321 is 123122504222.

222405221321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 111329662921 + 111075558400 = 333661^2 + 333280^2 .

It is a cyclic number.

It is not a de Polignac number, because 222405221321 - 2² = 222405221317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (222405221341) 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, 59369516 + ... + 59373261.

It is an arithmetic number, because the mean of its divisors is an integer number (55630991493).

Almost surely, 2^222405221321 is an apocalyptic number.

It is an amenable number.

222405221321 is a deficient number, since it is larger than the sum of its proper divisors (118744651).

222405221321 is a wasteful number, since it uses less digits than its factorization.

222405221321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118744650.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 222405221321 its reverse (123122504222), we get a palindrome (345527725543).

The spelling of 222405221321 in words is "two hundred twenty-two billion, four hundred five million, two hundred twenty-one thousand, three hundred twenty-one".