21113131333 has 8 divisors (see below), whose sum is σ = 24434727680. Its totient is φ = 17867893680.

The previous prime is 21113131331. The next prime is 21113131339. The reversal of 21113131333 is 33313131112.

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

It is not a de Polignac number, because 21113131333 - 2¹ = 21113131331 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 (21113131331) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19089078 + ... + 19090183.

It is an arithmetic number, because the mean of its divisors is an integer number (3054340960).

Almost surely, 2^21113131333 is an apocalyptic number.

It is an amenable number.

21113131333 is a deficient number, since it is larger than the sum of its proper divisors (3321596347).

21113131333 is an equidigital number, since it uses as much as digits as its factorization.

21113131333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38179347.

The product of its digits is 486, while the sum is 22.

Adding to 21113131333 its reverse (33313131112), we get a palindrome (54426262445).

The spelling of 21113131333 in words is "twenty-one billion, one hundred thirteen million, one hundred thirty-one thousand, three hundred thirty-three".