212221030121 has 8 divisors (see below), whose sum is σ = 212518689600. Its totient is φ = 211923562032.

The previous prime is 212221030097. The next prime is 212221030163. The reversal of 212221030121 is 121030122212.

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 212221030121 - 2⁶ = 212221030057 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 212221030121.

It is not an unprimeable number, because it can be changed into a prime (212221030171) 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, 2247956 + ... + 2340458.

It is an arithmetic number, because the mean of its divisors is an integer number (26564836200).

Almost surely, 2^212221030121 is an apocalyptic number.

It is an amenable number.

212221030121 is a deficient number, since it is larger than the sum of its proper divisors (297659479).

212221030121 is a wasteful number, since it uses less digits than its factorization.

212221030121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95695.

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

Adding to 212221030121 its reverse (121030122212), we get a palindrome (333251152333).

The spelling of 212221030121 in words is "two hundred twelve billion, two hundred twenty-one million, thirty thousand, one hundred twenty-one".