21013231133 has 8 divisors (see below), whose sum is σ = 21937258200. Its totient is φ = 20102499648.

The previous prime is 21013231111. The next prime is 21013231163. The reversal of 21013231133 is 33113231012.

It can be written as a sum of positive squares in 4 ways, for example, as 12214228324 + 8799002809 = 110518^2 + 93803^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 21013231133 - 2²⁶ = 20946122269 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 (21013231163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3320666 + ... + 3326987.

It is an arithmetic number, because the mean of its divisors is an integer number (2742157275).

Almost surely, 2^21013231133 is an apocalyptic number.

It is an amenable number.

21013231133 is a deficient number, since it is larger than the sum of its proper divisors (924027067).

21013231133 is a wasteful number, since it uses less digits than its factorization.

21013231133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647791.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21013231133 its reverse (33113231012), we get a palindrome (54126462145).

The spelling of 21013231133 in words is "twenty-one billion, thirteen million, two hundred thirty-one thousand, one hundred thirty-three".