21222110022211 has 12 divisors (see below), whose sum is σ = 24831000106032. Its totient is φ = 17767347914736.

The previous prime is 21222110022187. The next prime is 21222110022313. The reversal of 21222110022211 is 11222001122212.

It is not a de Polignac number, because 21222110022211 - 2¹⁹ = 21222109497923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222110022611) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 819816696 + ... + 819842581.

It is an arithmetic number, because the mean of its divisors is an integer number (2069250008836).

Almost surely, 2^{21222110022211} is an apocalyptic number.

21222110022211 is a deficient number, since it is larger than the sum of its proper divisors (3608890083821).

21222110022211 is an equidigital number, since it uses as much as digits as its factorization.

21222110022211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1639659370 (or 1639659327 counting only the distinct ones).

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

Adding to 21222110022211 its reverse (11222001122212), we get a palindrome (32444111144423).

The spelling of 21222110022211 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, twenty-two thousand, two hundred eleven".