21330512313211 has 2 divisors, whose sum is σ = 21330512313212. Its totient is φ = 21330512313210.

The previous prime is 21330512313169. The next prime is 21330512313217. The reversal of 21330512313211 is 11231321503312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21330512313211 - 2¹⁵ = 21330512280443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21330512313211.

It is not a weakly prime, because it can be changed into another prime (21330512313217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10665256156605 + 10665256156606.

It is an arithmetic number, because the mean of its divisors is an integer number (10665256156606).

Almost surely, 2^{21330512313211} is an apocalyptic number.

21330512313211 is a deficient number, since it is larger than the sum of its proper divisors (1).

21330512313211 is an equidigital number, since it uses as much as digits as its factorization.

21330512313211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

Adding to 21330512313211 its reverse (11231321503312), we get a palindrome (32561833816523).

The spelling of 21330512313211 in words is "twenty-one trillion, three hundred thirty billion, five hundred twelve million, three hundred thirteen thousand, two hundred eleven".