222222122221 has 8 divisors (see below), whose sum is σ = 242437608000. Its totient is φ = 202008882240.

The previous prime is 222222122219. The next prime is 222222122237. The reversal of 222222122221 is 122221222222.

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

It is not a de Polignac number, because 222222122221 - 2¹ = 222222122219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222222122192 and 222222122201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222122251) 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, 351121 + ... + 753478.

It is an arithmetic number, because the mean of its divisors is an integer number (30304701000).

Almost surely, 2^222222122221 is an apocalyptic number.

It is an amenable number.

222222122221 is a deficient number, since it is larger than the sum of its proper divisors (20215485779).

222222122221 is a wasteful number, since it uses less digits than its factorization.

222222122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1122899.

The product of its digits is 1024, while the sum is 22.

Adding to 222222122221 its reverse (122221222222), we get a palindrome (344443344443).

It can be divided in two parts, 222222 and 122221, that added together give a palindrome (344443).

The spelling of 222222122221 in words is "two hundred twenty-two billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred twenty-one".