121305133 has 4 divisors (see below), whose sum is σ = 123013728. Its totient is φ = 119596540.

The previous prime is 121305127. The next prime is 121305157. The reversal of 121305133 is 331503121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 331503121 = 809 ⋅409769.

It is a cyclic number.

It is not a de Polignac number, because 121305133 - 2⁹ = 121304621 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121305133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121305103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 854191 + ... + 854332.

It is an arithmetic number, because the mean of its divisors is an integer number (30753432).

Almost surely, 2^121305133 is an apocalyptic number.

It is an amenable number.

121305133 is a deficient number, since it is larger than the sum of its proper divisors (1708595).

121305133 is an equidigital number, since it uses as much as digits as its factorization.

121305133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1708594.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 121305133 is about 11013.8609488226. The cubic root of 121305133 is about 495.0241569002.

Adding to 121305133 its reverse (331503121), we get a palindrome (452808254).

The spelling of 121305133 in words is "one hundred twenty-one million, three hundred five thousand, one hundred thirty-three".