21040135033 has 2 divisors, whose sum is σ = 21040135034. Its totient is φ = 21040135032.

The previous prime is 21040135031. The next prime is 21040135091. The reversal of 21040135033 is 33053104012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11296076089 + 9744058944 = 106283^2 + 98712^2 .

It is a cyclic number.

It is not a de Polignac number, because 21040135033 - 2¹ = 21040135031 is a prime.

It is a super-2 number, since 2×21040135033² (a number of 21 digits) contains 22 as substring.

Together with 21040135031, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21040134995 and 21040135013.

It is not a weakly prime, because it can be changed into another prime (21040135031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10520067516 + 10520067517.

It is an arithmetic number, because the mean of its divisors is an integer number (10520067517).

Almost surely, 2^21040135033 is an apocalyptic number.

It is an amenable number.

21040135033 is a deficient number, since it is larger than the sum of its proper divisors (1).

21040135033 is an equidigital number, since it uses as much as digits as its factorization.

21040135033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 22.

Adding to 21040135033 its reverse (33053104012), we get a palindrome (54093239045).

The spelling of 21040135033 in words is "twenty-one billion, forty million, one hundred thirty-five thousand, thirty-three".