21103300333 has 4 divisors (see below), whose sum is σ = 21308186848. Its totient is φ = 20898413820.

The previous prime is 21103300327. The next prime is 21103300343. The reversal of 21103300333 is 33300330112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21103300333 - 2⁹ = 21103299821 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21103300333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21103300343) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 102443103 + ... + 102443308.

It is an arithmetic number, because the mean of its divisors is an integer number (5327046712).

Almost surely, 2^21103300333 is an apocalyptic number.

It is an amenable number.

21103300333 is a deficient number, since it is larger than the sum of its proper divisors (204886515).

21103300333 is a wasteful number, since it uses less digits than its factorization.

21103300333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204886514.

The product of its (nonzero) digits is 486, while the sum is 19.

Adding to 21103300333 its reverse (33300330112), we get a palindrome (54403630445).

The spelling of 21103300333 in words is "twenty-one billion, one hundred three million, three hundred thousand, three hundred thirty-three".