21001100230333 has 4 divisors (see below), whose sum is σ = 21046655762748. Its totient is φ = 20955544697920.

The previous prime is 21001100230301. The next prime is 21001100230337. The reversal of 21001100230333 is 33303200110012.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11174298468804 + 9826801761529 = 3342798^2 + 3134773^2 .

It is a cyclic number.

It is not a de Polignac number, because 21001100230333 - 2⁵ = 21001100230301 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 21001100230333.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21001100230337) 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, 22777765516 + ... + 22777766437.

It is an arithmetic number, because the mean of its divisors is an integer number (5261663940687).

Almost surely, 2^{21001100230333} is an apocalyptic number.

It is an amenable number.

21001100230333 is a deficient number, since it is larger than the sum of its proper divisors (45555532415).

21001100230333 is an equidigital number, since it uses as much as digits as its factorization.

21001100230333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45555532414.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21001100230333 its reverse (33303200110012), we get a palindrome (54304300340345).

The spelling of 21001100230333 in words is "twenty-one trillion, one billion, one hundred million, two hundred thirty thousand, three hundred thirty-three".