133221017 has 2 divisors, whose sum is σ = 133221018. Its totient is φ = 133221016.

The previous prime is 133220987. The next prime is 133221019. The reversal of 133221017 is 710122331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91087936 + 42133081 = 9544^2 + 6491^2 .

It is an emirp because it is prime and its reverse (710122331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133221017 - 2¹⁰ = 133219993 is a prime.

Together with 133221019, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133221017.

It is not a weakly prime, because it can be changed into another prime (133221019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66610508 + 66610509.

It is an arithmetic number, because the mean of its divisors is an integer number (66610509).

Almost surely, 2^133221017 is an apocalyptic number.

It is an amenable number.

133221017 is a deficient number, since it is larger than the sum of its proper divisors (1).

133221017 is an equidigital number, since it uses as much as digits as its factorization.

133221017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 133221017 is about 11542.1409192576. The cubic root of 133221017 is about 510.7294661884.

Adding to 133221017 its reverse (710122331), we get a palindrome (843343348).

The spelling of 133221017 in words is "one hundred thirty-three million, two hundred twenty-one thousand, seventeen".