121283209 has 8 divisors (see below), whose sum is σ = 127114560. Its totient is φ = 115498416.

The previous prime is 121283203. The next prime is 121283243. The reversal of 121283209 is 902382121.

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 121283209 - 2⁷ = 121283081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121283203) 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, 6247 + ... + 16780.

It is an arithmetic number, because the mean of its divisors is an integer number (15889320).

Almost surely, 2^121283209 is an apocalyptic number.

It is an amenable number.

121283209 is a deficient number, since it is larger than the sum of its proper divisors (5831351).

121283209 is a wasteful number, since it uses less digits than its factorization.

121283209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23279.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 121283209 is about 11012.8656125461. The cubic root of 121283209 is about 494.9943324862.

The spelling of 121283209 in words is "one hundred twenty-one million, two hundred eighty-three thousand, two hundred nine".