21222220030211 has 4 divisors (see below), whose sum is σ = 21352417699272. Its totient is φ = 21092022361152.

The previous prime is 21222220030199. The next prime is 21222220030243. The reversal of 21222220030211 is 11203002222212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21222220030211 - 2⁶ = 21222220030147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222220030111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65098834286 + ... + 65098834611.

It is an arithmetic number, because the mean of its divisors is an integer number (5338104424818).

Almost surely, 2^{21222220030211} is an apocalyptic number.

21222220030211 is a deficient number, since it is larger than the sum of its proper divisors (130197669061).

21222220030211 is a wasteful number, since it uses less digits than its factorization.

21222220030211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130197669060.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 21222220030211 its reverse (11203002222212), we get a palindrome (32425222252423).

The spelling of 21222220030211 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, thirty thousand, two hundred eleven".