121121309 has 8 divisors (see below), whose sum is σ = 125207040. Its totient is φ = 117046800.

The previous prime is 121121293. The next prime is 121121317. The reversal of 121121309 is 903121121.

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 121121309 - 2⁴ = 121121293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121121359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23072 + ... + 27830.

It is an arithmetic number, because the mean of its divisors is an integer number (15650880).

Almost surely, 2^121121309 is an apocalyptic number.

It is an amenable number.

121121309 is a deficient number, since it is larger than the sum of its proper divisors (4085731).

121121309 is an equidigital number, since it uses as much as digits as its factorization.

121121309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5611.

The product of its (nonzero) digits is 108, while the sum is 20.

The square root of 121121309 is about 11005.5126641152. The cubic root of 121121309 is about 494.7739797301.

The spelling of 121121309 in words is "one hundred twenty-one million, one hundred twenty-one thousand, three hundred nine".