135221033 has 2 divisors, whose sum is σ = 135221034. Its totient is φ = 135221032.

The previous prime is 135220973. The next prime is 135221063. The reversal of 135221033 is 330122531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 93644329 + 41576704 = 9677^2 + 6448^2 .

It is a cyclic number.

It is not a de Polignac number, because 135221033 - 2¹⁶ = 135155497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 135220996 and 135221014.

It is not a weakly prime, because it can be changed into another prime (135221063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67610516 + 67610517.

It is an arithmetic number, because the mean of its divisors is an integer number (67610517).

Almost surely, 2^135221033 is an apocalyptic number.

It is an amenable number.

135221033 is a deficient number, since it is larger than the sum of its proper divisors (1).

135221033 is an equidigital number, since it uses as much as digits as its factorization.

135221033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 135221033 is about 11628.4578943212. The cubic root of 135221033 is about 513.2726025398.

Adding to 135221033 its reverse (330122531), we get a palindrome (465343564).

The spelling of 135221033 in words is "one hundred thirty-five million, two hundred twenty-one thousand, thirty-three".