21021334033 has 12 divisors (see below), whose sum is σ = 24456425472. Its totient is φ = 18016048680.

The previous prime is 21021334007. The next prime is 21021334051. The reversal of 21021334033 is 33043312012.

It is not a de Polignac number, because 21021334033 - 2⁵ = 21021334001 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21021333995 and 21021334013.

It is not an unprimeable number, because it can be changed into a prime (21021334063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 462768 + ... + 506158.

It is an arithmetic number, because the mean of its divisors is an integer number (2038035456).

Almost surely, 2^21021334033 is an apocalyptic number.

It is an amenable number.

21021334033 is a deficient number, since it is larger than the sum of its proper divisors (3435091439).

21021334033 is an equidigital number, since it uses as much as digits as its factorization.

21021334033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53292 (or 53285 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 21021334033 its reverse (33043312012), we get a palindrome (54064646045).

The spelling of 21021334033 in words is "twenty-one billion, twenty-one million, three hundred thirty-four thousand, thirty-three".