21131020211333 has 8 divisors (see below), whose sum is σ = 21349159977600. Its totient is φ = 20912886449280.

The previous prime is 21131020211311. The next prime is 21131020211377. The reversal of 21131020211333 is 33311202013112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21131020211333 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21131020211299 and 21131020211308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21131020211233) 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 7 ways as a sum of consecutive naturals, for example, 5754068 + ... + 8681666.

It is an arithmetic number, because the mean of its divisors is an integer number (2668644997200).

Almost surely, 2^{21131020211333} is an apocalyptic number.

It is an amenable number.

21131020211333 is a deficient number, since it is larger than the sum of its proper divisors (218139766267).

21131020211333 is an equidigital number, since it uses as much as digits as its factorization.

21131020211333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3002107.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 21131020211333 its reverse (33311202013112), we get a palindrome (54442222224445).

The spelling of 21131020211333 in words is "twenty-one trillion, one hundred thirty-one billion, twenty million, two hundred eleven thousand, three hundred thirty-three".