134440121 has 2 divisors, whose sum is σ = 134440122. Its totient is φ = 134440120.

The previous prime is 134440109. The next prime is 134440139. The reversal of 134440121 is 121044431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133726096 + 714025 = 11564^2 + 845^2 .

It is an emirp because it is prime and its reverse (121044431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134440121 - 2⁶ = 134440057 is a prime.

It is a super-2 number, since 2×134440121² = 36148292268989282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 134440093 and 134440102.

It is not a weakly prime, because it can be changed into another prime (134440151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67220060 + 67220061.

It is an arithmetic number, because the mean of its divisors is an integer number (67220061).

Almost surely, 2^134440121 is an apocalyptic number.

It is an amenable number.

134440121 is a deficient number, since it is larger than the sum of its proper divisors (1).

134440121 is an equidigital number, since it uses as much as digits as its factorization.

134440121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 134440121 is about 11594.8316503518. The cubic root of 134440121 is about 512.2826312778.

Adding to 134440121 its reverse (121044431), we get a palindrome (255484552).

The spelling of 134440121 in words is "one hundred thirty-four million, four hundred forty thousand, one hundred twenty-one".