21130334033 has 8 divisors (see below), whose sum is σ = 21775501608. Its totient is φ = 20489065344.

The previous prime is 21130334009. The next prime is 21130334047. The reversal of 21130334033 is 33043303112.

It can be written as a sum of positive squares in 4 ways, for example, as 18522393409 + 2607940624 = 136097^2 + 51068^2 .

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 21130334033 - 2⁶ = 21130333969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21130334083) 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, 963716 + ... + 985397.

It is an arithmetic number, because the mean of its divisors is an integer number (2721937701).

Almost surely, 2^21130334033 is an apocalyptic number.

It is an amenable number.

21130334033 is a deficient number, since it is larger than the sum of its proper divisors (645167575).

21130334033 is a wasteful number, since it uses less digits than its factorization.

21130334033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1949443.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 21130334033 its reverse (33043303112), we get a palindrome (54173637145).

The spelling of 21130334033 in words is "twenty-one billion, one hundred thirty million, three hundred thirty-four thousand, thirty-three".