133340121 has 16 divisors (see below), whose sum is σ = 200249920. Its totient is φ = 87674400.

The previous prime is 133340093. The next prime is 133340153. The reversal of 133340121 is 121043331.

It is not a de Polignac number, because 133340121 - 2¹⁰ = 133339097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 133340094 and 133340103.

It is not an unprimeable number, because it can be changed into a prime (133340161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31855 + ... + 35796.

It is an arithmetic number, because the mean of its divisors is an integer number (12515620).

Almost surely, 2^133340121 is an apocalyptic number.

It is an amenable number.

133340121 is a deficient number, since it is larger than the sum of its proper divisors (66909799).

133340121 is an equidigital number, since it uses as much as digits as its factorization.

133340121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67733 (or 67727 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 133340121 is about 11547.2992946403. The cubic root of 133340121 is about 510.8816238703.

Adding to 133340121 its reverse (121043331), we get a palindrome (254383452).

The spelling of 133340121 in words is "one hundred thirty-three million, three hundred forty thousand, one hundred twenty-one".