121200208 has 20 divisors (see below), whose sum is σ = 248639220. Its totient is φ = 57035264.

The previous prime is 121200181. The next prime is 121200227. The reversal of 121200208 is 802002121.

It can be written as a sum of positive squares in 2 ways, for example, as 108326464 + 12873744 = 10408^2 + 3588^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 121200191 and 121200200.

It is a congruent number.

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, 222523 + ... + 223066.

It is an arithmetic number, because the mean of its divisors is an integer number (12431961).

Almost surely, 2^121200208 is an apocalyptic number.

It is an amenable number.

121200208 is an abundant number, since it is smaller than the sum of its proper divisors (127439012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121200208 is a wasteful number, since it uses less digits than its factorization.

121200208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445614 (or 445608 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 121200208 is about 11009.0966023557. The cubic root of 121200208 is about 494.8813891234.

Adding to 121200208 its reverse (802002121), we get a palindrome (923202329).

The spelling of 121200208 in words is "one hundred twenty-one million, two hundred thousand, two hundred eight".