21023231222211 has 16 divisors (see below), whose sum is σ = 28169957930400. Its totient is φ = 13946124808448.

The previous prime is 21023231222141. The next prime is 21023231222233. The reversal of 21023231222211 is 11222213232012.

It is a cyclic number.

It is not a de Polignac number, because 21023231222211 - 2¹¹ = 21023231220163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21023231322211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15447936 + ... + 16753661.

It is an arithmetic number, because the mean of its divisors is an integer number (1760622370650).

Almost surely, 2^{21023231222211} is an apocalyptic number.

21023231222211 is a deficient number, since it is larger than the sum of its proper divisors (7146726708189).

21023231222211 is a wasteful number, since it uses less digits than its factorization.

21023231222211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32202678.

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 21023231222211 its reverse (11222213232012), we get a palindrome (32245444454223).

The spelling of 21023231222211 in words is "twenty-one trillion, twenty-three billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred eleven".