222016121 has 8 divisors (see below), whose sum is σ = 234144000. Its totient is φ = 209932560.

The previous prime is 222016117. The next prime is 222016127. The reversal of 222016121 is 121610222.

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 222016121 - 2² = 222016117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 222016121.

It is not an unprimeable number, because it can be changed into a prime (222016127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 521 + ... + 21078.

It is an arithmetic number, because the mean of its divisors is an integer number (29268000).

Almost surely, 2^222016121 is an apocalyptic number.

It is an amenable number.

222016121 is a deficient number, since it is larger than the sum of its proper divisors (12127879).

222016121 is a wasteful number, since it uses less digits than its factorization.

222016121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22159.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 222016121 is about 14900.2054012688. The cubic root of 222016121 is about 605.5195509696.

Adding to 222016121 its reverse (121610222), we get a palindrome (343626343).

The spelling of 222016121 in words is "two hundred twenty-two million, sixteen thousand, one hundred twenty-one".