222222220221 has 8 divisors (see below), whose sum is σ = 296386120800. Its totient is φ = 148103233232.

The previous prime is 222222220217. The next prime is 222222220223. The reversal of 222222220221 is 122022222222.

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 222222220221 - 2² = 222222220217 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222222220223) 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, 11216850 + ... + 11236643.

It is an arithmetic number, because the mean of its divisors is an integer number (37048265100).

Almost surely, 2^222222220221 is an apocalyptic number.

It is an amenable number.

222222220221 is a deficient number, since it is larger than the sum of its proper divisors (74163900579).

222222220221 is a wasteful number, since it uses less digits than its factorization.

222222220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22456795.

The product of its (nonzero) digits is 1024, while the sum is 21.

Adding to 222222220221 its reverse (122022222222), we get a palindrome (344244442443).

The spelling of 222222220221 in words is "two hundred twenty-two billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twenty-one".