21033193133 has 2 divisors, whose sum is σ = 21033193134. Its totient is φ = 21033193132.

The previous prime is 21033193127. The next prime is 21033193199. The reversal of 21033193133 is 33139133012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21032830729 + 362404 = 145027^2 + 602^2 .

It is a cyclic number.

It is not a de Polignac number, because 21033193133 - 2⁴ = 21033193117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21033193096 and 21033193105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21033393133) 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 as a sum of consecutive naturals, namely, 10516596566 + 10516596567.

It is an arithmetic number, because the mean of its divisors is an integer number (10516596567).

Almost surely, 2^21033193133 is an apocalyptic number.

It is an amenable number.

21033193133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21033193133 is an equidigital number, since it uses as much as digits as its factorization.

21033193133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4374, while the sum is 29.

The spelling of 21033193133 in words is "twenty-one billion, thirty-three million, one hundred ninety-three thousand, one hundred thirty-three".