21220020210211 has 8 divisors (see below), whose sum is σ = 22142703965184. Its totient is φ = 20297342637000.

The previous prime is 21220020210203. The next prime is 21220020210227. The reversal of 21220020210211 is 11201202002212.

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 21220020210211 - 2³ = 21220020210203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21220020210241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6321220 + ... + 9077326.

It is an arithmetic number, because the mean of its divisors is an integer number (2767837995648).

Almost surely, 2^{21220020210211} is an apocalyptic number.

21220020210211 is a deficient number, since it is larger than the sum of its proper divisors (922683754973).

21220020210211 is a wasteful number, since it uses less digits than its factorization.

21220020210211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3090881.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21220020210211 its reverse (11201202002212), we get a palindrome (32421222212423).

The spelling of 21220020210211 in words is "twenty-one trillion, two hundred twenty billion, twenty million, two hundred ten thousand, two hundred eleven".