121934209 has 8 divisors (see below), whose sum is σ = 124139520. Its totient is φ = 119745600.

The previous prime is 121934177. The next prime is 121934227. The reversal of 121934209 is 902439121.

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 121934209 - 2⁵ = 121934177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121934249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11049 + ... + 19129.

It is an arithmetic number, because the mean of its divisors is an integer number (15517440).

Almost surely, 2^121934209 is an apocalyptic number.

It is an amenable number.

121934209 is a deficient number, since it is larger than the sum of its proper divisors (2205311).

121934209 is an equidigital number, since it uses as much as digits as its factorization.

121934209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8351.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 121934209 is about 11042.3823969287. The cubic root of 121934209 is about 495.8783967957.

The spelling of 121934209 in words is "one hundred twenty-one million, nine hundred thirty-four thousand, two hundred nine".