21033110313 has 6 divisors (see below), whose sum is σ = 30381159354. Its totient is φ = 14022073536.

The previous prime is 21033110297. The next prime is 21033110323. The reversal of 21033110313 is 31301133012.

It is a happy number.

21033110313 is a `hidden beast` number, since 2 + 10 + 331 + 10 + 313 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12045501504 + 8987608809 = 109752^2 + 94803^2 .

It is not a de Polignac number, because 21033110313 - 2⁴ = 21033110297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21033110323) 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 5 ways as a sum of consecutive naturals, for example, 1168506120 + ... + 1168506137.

It is an arithmetic number, because the mean of its divisors is an integer number (5063526559).

Almost surely, 2^21033110313 is an apocalyptic number.

It is an amenable number.

21033110313 is a deficient number, since it is larger than the sum of its proper divisors (9348049041).

21033110313 is a wasteful number, since it uses less digits than its factorization.

21033110313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337012263 (or 2337012260 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 21033110313 its reverse (31301133012), we get a palindrome (52334243325).

The spelling of 21033110313 in words is "twenty-one billion, thirty-three million, one hundred ten thousand, three hundred thirteen".