220121200212 has 12 divisors (see below), whose sum is σ = 513616133856. Its totient is φ = 73373733400.

The previous prime is 220121200171. The next prime is 220121200267. The reversal of 220121200212 is 212002121022.

220121200212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 220121200191 and 220121200200.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9171716664 + ... + 9171716687.

It is an arithmetic number, because the mean of its divisors is an integer number (42801344488).

Almost surely, 2^220121200212 is an apocalyptic number.

It is an amenable number.

220121200212 is an abundant number, since it is smaller than the sum of its proper divisors (293494933644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

220121200212 is a wasteful number, since it uses less digits than its factorization.

220121200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18343433358 (or 18343433356 counting only the distinct ones).

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

Adding to 220121200212 its reverse (212002121022), we get a palindrome (432123321234).

The spelling of 220121200212 in words is "two hundred twenty billion, one hundred twenty-one million, two hundred thousand, two hundred twelve".