21331301033 has 16 divisors (see below), whose sum is σ = 25451262720. Its totient is φ = 17480291136.

The previous prime is 21331301011. The next prime is 21331301071. The reversal of 21331301033 is 33010313312.

It is not a de Polignac number, because 21331301033 - 2¹⁴ = 21331284649 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21331300996 and 21331301014.

It is not an unprimeable number, because it can be changed into a prime (21331301093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 301091 + ... + 365127.

It is an arithmetic number, because the mean of its divisors is an integer number (1590703920).

Almost surely, 2^21331301033 is an apocalyptic number.

21331301033 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

21331301033 is a deficient number, since it is larger than the sum of its proper divisors (4119961687).

21331301033 is a wasteful number, since it uses less digits than its factorization.

21331301033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66136.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 21331301033 its reverse (33010313312), we get a palindrome (54341614345).

The spelling of 21331301033 in words is "twenty-one billion, three hundred thirty-one million, three hundred one thousand, thirty-three".