21010033133 has 2 divisors, whose sum is σ = 21010033134. Its totient is φ = 21010033132.

The previous prime is 21010033127. The next prime is 21010033141. The reversal of 21010033133 is 33133001012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19918523689 + 1091509444 = 141133^2 + 33038^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010033133 - 2⁶ = 21010033069 is a prime.

It is a super-3 number, since 3×21010033133³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010035133) 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, 10505016566 + 10505016567.

It is an arithmetic number, because the mean of its divisors is an integer number (10505016567).

Almost surely, 2^21010033133 is an apocalyptic number.

It is an amenable number.

21010033133 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010033133 is an equidigital number, since it uses as much as digits as its factorization.

21010033133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 17.

Adding to 21010033133 its reverse (33133001012), we get a palindrome (54143034145).

The spelling of 21010033133 in words is "twenty-one billion, ten million, thirty-three thousand, one hundred thirty-three".