222002222221 has 8 divisors (see below), whose sum is σ = 240105411000. Its totient is φ = 204045618432.

The previous prime is 222002222209. The next prime is 222002222231. The reversal of 222002222221 is 122222200222.

It can be written as a sum of positive squares in 4 ways, for example, as 7623036100 + 214379186121 = 87310^2 + 463011^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 222002222221 - 2³¹ = 219854738573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222002222231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36643096 + ... + 36649153.

It is an arithmetic number, because the mean of its divisors is an integer number (30013176375).

Almost surely, 2^222002222221 is an apocalyptic number.

It is an amenable number.

222002222221 is a deficient number, since it is larger than the sum of its proper divisors (18103188779).

222002222221 is a wasteful number, since it uses less digits than its factorization.

222002222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73292495.

The product of its (nonzero) digits is 512, while the sum is 19.

Adding to 222002222221 its reverse (122222200222), we get a palindrome (344224422443).

The spelling of 222002222221 in words is "two hundred twenty-two billion, two million, two hundred twenty-two thousand, two hundred twenty-one".