21211332211 has 2 divisors, whose sum is σ = 21211332212. Its totient is φ = 21211332210.

The previous prime is 21211332209. The next prime is 21211332223. The reversal of 21211332211 is 11223311212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21211332211 - 2¹ = 21211332209 is a prime.

It is a super-2 number, since 2×21211332211² (a number of 21 digits) contains 22 as substring.

Together with 21211332209, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21211330211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605666105 + 10605666106.

It is an arithmetic number, because the mean of its divisors is an integer number (10605666106).

Almost surely, 2^21211332211 is an apocalyptic number.

21211332211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211332211 is an equidigital number, since it uses as much as digits as its factorization.

21211332211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 144, while the sum is 19.

Adding to 21211332211 its reverse (11223311212), we get a palindrome (32434643423).

The spelling of 21211332211 in words is "twenty-one billion, two hundred eleven million, three hundred thirty-two thousand, two hundred eleven".