21013325535911 has 2 divisors, whose sum is σ = 21013325535912. Its totient is φ = 21013325535910.

The previous prime is 21013325535907. The next prime is 21013325535959. The reversal of 21013325535911 is 11953552331012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21013325535911 - 2² = 21013325535907 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21013325505911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506662767955 + 10506662767956.

It is an arithmetic number, because the mean of its divisors is an integer number (10506662767956).

Almost surely, 2^{21013325535911} is an apocalyptic number.

21013325535911 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013325535911 is an equidigital number, since it uses as much as digits as its factorization.

21013325535911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121500, while the sum is 41.

Adding to 21013325535911 its reverse (11953552331012), we get a palindrome (32966877866923).

The spelling of 21013325535911 in words is "twenty-one trillion, thirteen billion, three hundred twenty-five million, five hundred thirty-five thousand, nine hundred eleven".