21210123000133 has 8 divisors (see below), whose sum is σ = 21420856488600. Its totient is φ = 20999793604608.

The previous prime is 21210123000109. The next prime is 21210123000151. The reversal of 21210123000133 is 33100032101212.

It can be written as a sum of positive squares in 4 ways, for example, as 2166613251364 + 19043509748769 = 1471942^2 + 4363887^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21210123000133 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 21210123000133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210123000163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100917738 + ... + 101127691.

It is an arithmetic number, because the mean of its divisors is an integer number (2677607061075).

Almost surely, 2^{21210123000133} is an apocalyptic number.

It is an amenable number.

21210123000133 is a deficient number, since it is larger than the sum of its proper divisors (210733488467).

21210123000133 is a wasteful number, since it uses less digits than its factorization.

21210123000133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202046471.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21210123000133 its reverse (33100032101212), we get a palindrome (54310155101345).

The spelling of 21210123000133 in words is "twenty-one trillion, two hundred ten billion, one hundred twenty-three million, one hundred thirty-three", and thus it is an aban number.