21222110202211 has 2 divisors, whose sum is σ = 21222110202212. Its totient is φ = 21222110202210.

The previous prime is 21222110202197. The next prime is 21222110202233. The reversal of 21222110202211 is 11220201122212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21222110202211 is a prime.

It is a super-2 number, since 2×21222110202211² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21222110205211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611055101105 + 10611055101106.

It is an arithmetic number, because the mean of its divisors is an integer number (10611055101106).

Almost surely, 2^{21222110202211} is an apocalyptic number.

21222110202211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222110202211 is an equidigital number, since it uses as much as digits as its factorization.

21222110202211 is an evil number, because the sum of its binary digits is even.

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

Adding to 21222110202211 its reverse (11220201122212), we get a palindrome (32442311324423).

The spelling of 21222110202211 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, two hundred two thousand, two hundred eleven".