133440121 has 2 divisors, whose sum is σ = 133440122. Its totient is φ = 133440120.

The previous prime is 133440101. The next prime is 133440127. The reversal of 133440121 is 121044331.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133148521 + 291600 = 11539^2 + 540^2 .

It is a cyclic number.

It is not a de Polignac number, because 133440121 - 2⁷ = 133439993 is a prime.

It is not a weakly prime, because it can be changed into another prime (133440127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66720060 + 66720061.

It is an arithmetic number, because the mean of its divisors is an integer number (66720061).

Almost surely, 2^133440121 is an apocalyptic number.

It is an amenable number.

133440121 is a deficient number, since it is larger than the sum of its proper divisors (1).

133440121 is an equidigital number, since it uses as much as digits as its factorization.

133440121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 133440121 is about 11551.6284999129. The cubic root of 133440121 is about 511.0093058611.

Adding to 133440121 its reverse (121044331), we get a palindrome (254484452).

The spelling of 133440121 in words is "one hundred thirty-three million, four hundred forty thousand, one hundred twenty-one".