21331330033 has 8 divisors (see below), whose sum is σ = 22973404608. Its totient is φ = 19689427344.

The previous prime is 21331330019. The next prime is 21331330037. The reversal of 21331330033 is 33003313312.

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

It is not a de Polignac number, because 21331330033 - 2¹⁷ = 21331198961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21331329986 and 21331330013.

It is not an unprimeable number, because it can be changed into a prime (21331330037) 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, 343716 + ... + 401002.

It is an arithmetic number, because the mean of its divisors is an integer number (2871675576).

Almost surely, 2^21331330033 is an apocalyptic number.

It is an amenable number.

21331330033 is a deficient number, since it is larger than the sum of its proper divisors (1642074575).

21331330033 is a wasteful number, since it uses less digits than its factorization.

21331330033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85943.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 21331330033 its reverse (33003313312), we get a palindrome (54334643345).

The spelling of 21331330033 in words is "twenty-one billion, three hundred thirty-one million, three hundred thirty thousand, thirty-three".