21220221120211 has 8 divisors (see below), whose sum is σ = 22340377833920. Its totient is φ = 20100394703592.

The previous prime is 21220221120209. The next prime is 21220221120253. The reversal of 21220221120211 is 11202112202212.

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 21220221120211 - 2¹ = 21220221120209 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (21220221127211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82442385 + ... + 82699378.

It is an arithmetic number, because the mean of its divisors is an integer number (2792547229240).

Almost surely, 2^{21220221120211} is an apocalyptic number.

21220221120211 is a deficient number, since it is larger than the sum of its proper divisors (1120156713709).

21220221120211 is a wasteful number, since it uses less digits than its factorization.

21220221120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165148545.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21220221120211 its reverse (11202112202212), we get a palindrome (32422333322423).

The spelling of 21220221120211 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty-one million, one hundred twenty thousand, two hundred eleven".