134215121 has 2 divisors, whose sum is σ = 134215122. Its totient is φ = 134215120.

The previous prime is 134215111. The next prime is 134215141. The reversal of 134215121 is 121512431.

It is an a-pointer prime, because the next prime (134215141) can be obtained adding 134215121 to its sum of digits (20).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131446225 + 2768896 = 11465^2 + 1664^2 .

It is an emirp because it is prime and its reverse (121512431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134215121 - 2⁶ = 134215057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 134215093 and 134215102.

It is not a weakly prime, because it can be changed into another prime (134215111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67107560 + 67107561.

It is an arithmetic number, because the mean of its divisors is an integer number (67107561).

Almost surely, 2^134215121 is an apocalyptic number.

It is an amenable number.

134215121 is a deficient number, since it is larger than the sum of its proper divisors (1).

134215121 is an equidigital number, since it uses as much as digits as its factorization.

134215121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 20.

The square root of 134215121 is about 11585.1249885359. The cubic root of 134215121 is about 511.9966850066.

Adding to 134215121 its reverse (121512431), we get a palindrome (255727552).

The spelling of 134215121 in words is "one hundred thirty-four million, two hundred fifteen thousand, one hundred twenty-one".