121800208 has 20 divisors (see below), whose sum is σ = 239222908. Its totient is φ = 60065280.

The previous prime is 121800191. The next prime is 121800221. The reversal of 121800208 is 802008121.

It can be written as a sum of positive squares in 2 ways, for example, as 58247424 + 63552784 = 7632^2 + 7972^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50973 + ... + 53308.

Almost surely, 2^121800208 is an apocalyptic number.

It is an amenable number.

121800208 is a deficient number, since it is larger than the sum of its proper divisors (117422700).

121800208 is a wasteful number, since it uses less digits than its factorization.

121800208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104362 (or 104356 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

The square root of 121800208 is about 11036.3131524980. The cubic root of 121800208 is about 495.6966797921.

Adding to 121800208 its reverse (802008121), we get a palindrome (923808329).

The spelling of 121800208 in words is "one hundred twenty-one million, eight hundred thousand, two hundred eight".