121320309 has 8 divisors (see below), whose sum is σ = 176465952. Its totient is φ = 73527440.

The previous prime is 121320289. The next prime is 121320319. The reversal of 121320309 is 903023121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121320309 - 2⁷ = 121320181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121320319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1838154 + ... + 1838219.

It is an arithmetic number, because the mean of its divisors is an integer number (22058244).

Almost surely, 2^121320309 is an apocalyptic number.

It is an amenable number.

121320309 is a deficient number, since it is larger than the sum of its proper divisors (55145643).

121320309 is a wasteful number, since it uses less digits than its factorization.

121320309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3676387.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 121320309 is about 11014.5498773214. The cubic root of 121320309 is about 495.0447995368.

The spelling of 121320309 in words is "one hundred twenty-one million, three hundred twenty thousand, three hundred nine".