121330309 has 4 divisors (see below), whose sum is σ = 128467404. Its totient is φ = 114193216.

The previous prime is 121330283. The next prime is 121330327. The reversal of 121330309 is 903033121.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 59629284 + 61701025 = 7722^2 + 7855^2 .

It is not a de Polignac number, because 121330309 - 2⁵ = 121330277 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 121330309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121330109) 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, 3568522 + ... + 3568555.

It is an arithmetic number, because the mean of its divisors is an integer number (32116851).

Almost surely, 2^121330309 is an apocalyptic number.

It is an amenable number.

121330309 is a deficient number, since it is larger than the sum of its proper divisors (7137095).

121330309 is an equidigital number, since it uses as much as digits as its factorization.

121330309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137094.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 121330309 is about 11015.0038129816. The cubic root of 121330309 is about 495.0584007550.

The spelling of 121330309 in words is "one hundred twenty-one million, three hundred thirty thousand, three hundred nine".