221222000121 has 8 divisors (see below), whose sum is σ = 294964839264. Its totient is φ = 147480247200.

The previous prime is 221222000119. The next prime is 221222000123. The reversal of 221222000121 is 121000222122.

It is an interprime number because it is at equal distance from previous prime (221222000119) and next prime (221222000123).

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

It is not a de Polignac number, because 221222000121 - 2¹ = 221222000119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221222000121.

It is not an unprimeable number, because it can be changed into a prime (221222000123) 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, 675550 + ... + 948056.

It is an arithmetic number, because the mean of its divisors is an integer number (36870604908).

Almost surely, 2^221222000121 is an apocalyptic number.

It is an amenable number.

221222000121 is a deficient number, since it is larger than the sum of its proper divisors (73742839143).

221222000121 is a wasteful number, since it uses less digits than its factorization.

221222000121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543111.

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

Adding to 221222000121 its reverse (121000222122), we get a palindrome (342222222243).

The spelling of 221222000121 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one", and thus it is an aban number.