222000121221 has 8 divisors (see below), whose sum is σ = 301017113760. Its totient is φ = 145491604752.

The previous prime is 222000121201. The next prime is 222000121247. The reversal of 222000121221 is 122121000222.

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

It is not a de Polignac number, because 222000121221 - 2⁷ = 222000121093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222000121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (222000121201) 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, 627118810 + ... + 627119163.

It is an arithmetic number, because the mean of its divisors is an integer number (37627139220).

Almost surely, 2^222000121221 is an apocalyptic number.

It is an amenable number.

222000121221 is a deficient number, since it is larger than the sum of its proper divisors (79016992539).

222000121221 is a wasteful number, since it uses less digits than its factorization.

222000121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1254238035.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 222000121221 its reverse (122121000222), we get a palindrome (344121121443).

The spelling of 222000121221 in words is "two hundred twenty-two billion, one hundred twenty-one thousand, two hundred twenty-one".