21032021333 has 4 divisors (see below), whose sum is σ = 21600454380. Its totient is φ = 20463588288.

The previous prime is 21032021317. The next prime is 21032021347. The reversal of 21032021333 is 33312023012.

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 7207670404 + 13824350929 = 84898^2 + 117577^2 .

It is a cyclic number.

It is not a de Polignac number, because 21032021333 - 2⁴ = 21032021317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21032021033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 284216468 + ... + 284216541.

It is an arithmetic number, because the mean of its divisors is an integer number (5400113595).

Almost surely, 2^21032021333 is an apocalyptic number.

It is an amenable number.

21032021333 is a deficient number, since it is larger than the sum of its proper divisors (568433047).

21032021333 is an equidigital number, since it uses as much as digits as its factorization.

21032021333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 568433046.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21032021333 its reverse (33312023012), we get a palindrome (54344044345).

The spelling of 21032021333 in words is "twenty-one billion, thirty-two million, twenty-one thousand, three hundred thirty-three".