21331003333 has 16 divisors (see below), whose sum is σ = 21962367216. Its totient is φ = 20708746240.

The previous prime is 21331003303. The next prime is 21331003363. The reversal of 21331003333 is 33330013312.

It is an interprime number because it is at equal distance from previous prime (21331003303) and next prime (21331003363).

It can be written as a sum of positive squares in 8 ways, for example, as 1519596324 + 19811407009 = 38982^2 + 140753^2 .

It is a cyclic number.

It is not a de Polignac number, because 21331003333 - 2⁵ = 21331003301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21331003303) 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, 4051923 + ... + 4057183.

It is an arithmetic number, because the mean of its divisors is an integer number (1372647951).

Almost surely, 2^21331003333 is an apocalyptic number.

It is an amenable number.

21331003333 is a deficient number, since it is larger than the sum of its proper divisors (631363883).

21331003333 is a wasteful number, since it uses less digits than its factorization.

21331003333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6104.

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

Adding to 21331003333 its reverse (33330013312), we get a palindrome (54661016645).

The spelling of 21331003333 in words is "twenty-one billion, three hundred thirty-one million, three thousand, three hundred thirty-three".