222312122221 has 32 divisors (see below), whose sum is σ = 269174638080. Its totient is φ = 179594016000.

The previous prime is 222312122173. The next prime is 222312122239. The reversal of 222312122221 is 122221213222.

It is a happy number.

It is not a de Polignac number, because 222312122221 - 2⁹ = 222312121709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222312122192 and 222312122201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222312122321) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1379355 + ... + 1532071.

It is an arithmetic number, because the mean of its divisors is an integer number (8411707440).

Almost surely, 2^222312122221 is an apocalyptic number.

It is an amenable number.

222312122221 is a deficient number, since it is larger than the sum of its proper divisors (46862515859).

222312122221 is a wasteful number, since it uses less digits than its factorization.

222312122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152925.

The product of its digits is 768, while the sum is 22.

Adding to 222312122221 its reverse (122221213222), we get a palindrome (344533335443).

The spelling of 222312122221 in words is "two hundred twenty-two billion, three hundred twelve million, one hundred twenty-two thousand, two hundred twenty-one".