21133210133 has 8 divisors (see below), whose sum is σ = 24157627968. Its totient is φ = 18110139264.

The previous prime is 21133210099. The next prime is 21133210141. The reversal of 21133210133 is 33101233112.

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

It is a de Polignac number, because none of the positive numbers 2^k-21133210133 is a prime.

It is a super-2 number, since 2×21133210133² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21133210633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302891 + ... + 366072.

It is an arithmetic number, because the mean of its divisors is an integer number (3019703496).

Almost surely, 2^21133210133 is an apocalyptic number.

It is an amenable number.

21133210133 is a deficient number, since it is larger than the sum of its proper divisors (3024417835).

21133210133 is an equidigital number, since it uses as much as digits as its factorization.

21133210133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 673483.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21133210133 its reverse (33101233112), we get a palindrome (54234443245).

The spelling of 21133210133 in words is "twenty-one billion, one hundred thirty-three million, two hundred ten thousand, one hundred thirty-three".