222120220121 has 8 divisors (see below), whose sum is σ = 229776378624. Its totient is φ = 214494748560.

The previous prime is 222120220111. The next prime is 222120220159. The reversal of 222120220121 is 121022021222.

It is a happy number.

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 222120220121 - 2³⁰ = 221046478297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222120220121.

It is not an unprimeable number, because it can be changed into a prime (222120220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7657010 + ... + 7685963.

It is an arithmetic number, because the mean of its divisors is an integer number (28722047328).

Almost surely, 2^222120220121 is an apocalyptic number.

It is an amenable number.

222120220121 is a deficient number, since it is larger than the sum of its proper divisors (7656158503).

222120220121 is a wasteful number, since it uses less digits than its factorization.

222120220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15343471.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 222120220121 its reverse (121022021222), we get a palindrome (343142241343).

The spelling of 222120220121 in words is "two hundred twenty-two billion, one hundred twenty million, two hundred twenty thousand, one hundred twenty-one".