121107309 has 4 divisors (see below), whose sum is σ = 161476416. Its totient is φ = 80738204.

The previous prime is 121107293. The next prime is 121107323. The reversal of 121107309 is 903701121.

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: 903701121 = 3 ⋅301233707.

It is a cyclic number.

It is not a de Polignac number, because 121107309 - 2⁴ = 121107293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121107409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20184549 + ... + 20184554.

It is an arithmetic number, because the mean of its divisors is an integer number (40369104).

Almost surely, 2^121107309 is an apocalyptic number.

It is an amenable number.

121107309 is a deficient number, since it is larger than the sum of its proper divisors (40369107).

121107309 is an equidigital number, since it uses as much as digits as its factorization.

121107309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40369106.

The product of its (nonzero) digits is 378, while the sum is 24.

The square root of 121107309 is about 11004.8766008529. The cubic root of 121107309 is about 494.7549159152.

The spelling of 121107309 in words is "one hundred twenty-one million, one hundred seven thousand, three hundred nine".