222211212221 has 8 divisors (see below), whose sum is σ = 233935617600. Its totient is φ = 210489714720.

The previous prime is 222211212211. The next prime is 222211212263. The reversal of 222211212221 is 122212112222.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222211212221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 222211212193 and 222211212202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222211212211) 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, 569225 + ... + 876606.

It is an arithmetic number, because the mean of its divisors is an integer number (29241952200).

Almost surely, 2^222211212221 is an apocalyptic number.

It is an amenable number.

222211212221 is a deficient number, since it is larger than the sum of its proper divisors (11724405379).

222211212221 is a wasteful number, since it uses less digits than its factorization.

222211212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1453939.

The product of its digits is 256, while the sum is 20.

Adding to 222211212221 its reverse (122212112222), we get a palindrome (344423324443).

Subtracting from 222211212221 its reverse (122212112222), we obtain a palindrome (99999099999).

The spelling of 222211212221 in words is "two hundred twenty-two billion, two hundred eleven million, two hundred twelve thousand, two hundred twenty-one".