21222110222011 has 2 divisors, whose sum is σ = 21222110222012. Its totient is φ = 21222110222010.

The previous prime is 21222110222009. The next prime is 21222110222029. The reversal of 21222110222011 is 11022201122212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222110222011 - 2¹ = 21222110222009 is a prime.

Together with 21222110222009, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21222110222011.

It is not a weakly prime, because it can be changed into another prime (21222110222711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611055111005 + 10611055111006.

It is an arithmetic number, because the mean of its divisors is an integer number (10611055111006).

Almost surely, 2^{21222110222011} is an apocalyptic number.

21222110222011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222110222011 is an equidigital number, since it uses as much as digits as its factorization.

21222110222011 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 21222110222011 its reverse (11022201122212), we get a palindrome (32244311344223).

The spelling of 21222110222011 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred ten million, two hundred twenty-two thousand, eleven".