20210021200221 has 8 divisors (see below), whose sum is σ = 26946723560064. Its totient is φ = 13473333153600.

The previous prime is 20210021200153. The next prime is 20210021200297. The reversal of 20210021200221 is 12200212001202.

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

It is not a de Polignac number, because 20210021200221 - 2⁷ = 20210021200093 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20210021200221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20210021210221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 324396 + ... + 6365946.

It is an arithmetic number, because the mean of its divisors is an integer number (3368340445008).

Almost surely, 2^{20210021200221} is an apocalyptic number.

It is an amenable number.

20210021200221 is a deficient number, since it is larger than the sum of its proper divisors (6736702359843).

20210021200221 is a wasteful number, since it uses less digits than its factorization.

20210021200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7156611.

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

Adding to 20210021200221 its reverse (12200212001202), we get a palindrome (32410233201423).

It can be divided in two parts, 2021002 and 1200221, that added together give a palindrome (3221223).

The spelling of 20210021200221 in words is "twenty trillion, two hundred ten billion, twenty-one million, two hundred thousand, two hundred twenty-one".