21251330133333 has 8 divisors (see below), whose sum is σ = 28340480487168. Its totient is φ = 14164866600864.

The previous prime is 21251330133317. The next prime is 21251330133343. The reversal of 21251330133333 is 33333103315212.

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

It is not a de Polignac number, because 21251330133333 - 2⁴ = 21251330133317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21251330133294 and 21251330133303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21251330133343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 671686885 + ... + 671718522.

It is an arithmetic number, because the mean of its divisors is an integer number (3542560060896).

Almost surely, 2^{21251330133333} is an apocalyptic number.

It is an amenable number.

21251330133333 is a deficient number, since it is larger than the sum of its proper divisors (7089150353835).

21251330133333 is a wasteful number, since it uses less digits than its factorization.

21251330133333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343410683.

The product of its (nonzero) digits is 43740, while the sum is 33.

Adding to 21251330133333 its reverse (33333103315212), we get a palindrome (54584433448545).

The spelling of 21251330133333 in words is "twenty-one trillion, two hundred fifty-one billion, three hundred thirty million, one hundred thirty-three thousand, three hundred thirty-three".