21210443233 has 8 divisors (see below), whose sum is σ = 24273314240. Its totient is φ = 18155774160.

The previous prime is 21210443213. The next prime is 21210443237. The reversal of 21210443233 is 33234401212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21210443233 - 2⁵ = 21210443201 is a prime.

It is a super-3 number, since 3×21210443233³ (a number of 32 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21210443198 and 21210443207.

It is not an unprimeable number, because it can be changed into a prime (21210443237) 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 7 ways as a sum of consecutive naturals, for example, 2044938 + ... + 2055283.

It is an arithmetic number, because the mean of its divisors is an integer number (3034164280).

Almost surely, 2^21210443233 is an apocalyptic number.

It is an amenable number.

21210443233 is a deficient number, since it is larger than the sum of its proper divisors (3062871007).

21210443233 is an equidigital number, since it uses as much as digits as its factorization.

21210443233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100967.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21210443233 its reverse (33234401212), we get a palindrome (54444844445).

The spelling of 21210443233 in words is "twenty-one billion, two hundred ten million, four hundred forty-three thousand, two hundred thirty-three".