21222032011 has 2 divisors, whose sum is σ = 21222032012. Its totient is φ = 21222032010.

The previous prime is 21222031997. The next prime is 21222032077. The reversal of 21222032011 is 11023022212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222032011 - 2¹³ = 21222023819 is a prime.

It is not a weakly prime, because it can be changed into another prime (21222092011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611016005 + 10611016006.

It is an arithmetic number, because the mean of its divisors is an integer number (10611016006).

Almost surely, 2^21222032011 is an apocalyptic number.

21222032011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222032011 is an equidigital number, since it uses as much as digits as its factorization.

21222032011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21222032011 its reverse (11023022212), we get a palindrome (32245054223).

The spelling of 21222032011 in words is "twenty-one billion, two hundred twenty-two million, thirty-two thousand, eleven".