21200221120211 has 8 divisors (see below), whose sum is σ = 25282251273984. Its totient is φ = 17381547750600.

The previous prime is 21200221120193. The next prime is 21200221120213. The reversal of 21200221120211 is 11202112200212.

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 21200221120211 - 2¹⁴ = 21200221103827 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 21200221120211.

It is not an unprimeable number, because it can be changed into a prime (21200221120213) 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, 65839195865 + ... + 65839196186.

It is an arithmetic number, because the mean of its divisors is an integer number (3160281409248).

Almost surely, 2^{21200221120211} is an apocalyptic number.

21200221120211 is a deficient number, since it is larger than the sum of its proper divisors (4082030153773).

21200221120211 is a wasteful number, since it uses less digits than its factorization.

21200221120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131678392081.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21200221120211 its reverse (11202112200212), we get a palindrome (32402333320423).

The spelling of 21200221120211 in words is "twenty-one trillion, two hundred billion, two hundred twenty-one million, one hundred twenty thousand, two hundred eleven".