121233209 has 8 divisors (see below), whose sum is σ = 122430528. Its totient is φ = 120042160.

The previous prime is 121233199. The next prime is 121233221. The reversal of 121233209 is 902332121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121233209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121233109) 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, 43364 + ... + 46074.

It is an arithmetic number, because the mean of its divisors is an integer number (15303816).

Almost surely, 2^121233209 is an apocalyptic number.

It is an amenable number.

121233209 is a deficient number, since it is larger than the sum of its proper divisors (1197319).

121233209 is a wasteful number, since it uses less digits than its factorization.

121233209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 121233209 is about 11010.5953063402. The cubic root of 121233209 is about 494.9263013089.

The spelling of 121233209 in words is "one hundred twenty-one million, two hundred thirty-three thousand, two hundred nine".