21013325535311 has 4 divisors (see below), whose sum is σ = 21021157563912. Its totient is φ = 21005493506712.

The previous prime is 21013325535281. The next prime is 21013325535353. The reversal of 21013325535311 is 11353552331012.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21013325535311 - 2⁶ = 21013325535247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013325535911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3916010276 + ... + 3916015641.

It is an arithmetic number, because the mean of its divisors is an integer number (5255289390978).

Almost surely, 2^{21013325535311} is an apocalyptic number.

21013325535311 is a deficient number, since it is larger than the sum of its proper divisors (7832028601).

21013325535311 is an equidigital number, since it uses as much as digits as its factorization.

21013325535311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7832028600.

The product of its (nonzero) digits is 40500, while the sum is 35.

Adding to 21013325535311 its reverse (11353552331012), we get a palindrome (32366877866323).

The spelling of 21013325535311 in words is "twenty-one trillion, thirteen billion, three hundred twenty-five million, five hundred thirty-five thousand, three hundred eleven".