133364221 has 2 divisors, whose sum is σ = 133364222. Its totient is φ = 133364220.

The previous prime is 133364213. The next prime is 133364227. The reversal of 133364221 is 122463331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130759225 + 2604996 = 11435^2 + 1614^2 .

It is an emirp because it is prime and its reverse (122463331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133364221 - 2³ = 133364213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133364227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66682110 + 66682111.

It is an arithmetic number, because the mean of its divisors is an integer number (66682111).

Almost surely, 2^133364221 is an apocalyptic number.

It is an amenable number.

133364221 is a deficient number, since it is larger than the sum of its proper divisors (1).

133364221 is an equidigital number, since it uses as much as digits as its factorization.

133364221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

The square root of 133364221 is about 11548.3427815423. The cubic root of 133364221 is about 510.9124010670.

The spelling of 133364221 in words is "one hundred thirty-three million, three hundred sixty-four thousand, two hundred twenty-one".