20210020212221 has 8 divisors (see below), whose sum is σ = 23356684676160. Its totient is φ = 17128235428128.

The previous prime is 20210020212163. The next prime is 20210020212223. The reversal of 20210020212221 is 12221202001202.

It is a happy number.

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 20210020212221 - 2⁶ = 20210020212157 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 20210020212221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210020212223) 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, 16219919291 + ... + 16219920536.

It is an arithmetic number, because the mean of its divisors is an integer number (2919585584520).

Almost surely, 2^{20210020212221} is an apocalyptic number.

It is an amenable number.

20210020212221 is a deficient number, since it is larger than the sum of its proper divisors (3146664463939).

20210020212221 is an equidigital number, since it uses as much as digits as its factorization.

20210020212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32439839923.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 20210020212221 its reverse (12221202001202), we get a palindrome (32431222213423).

The spelling of 20210020212221 in words is "twenty trillion, two hundred ten billion, twenty million, two hundred twelve thousand, two hundred twenty-one".