121818202 has 12 divisors (see below), whose sum is σ = 200849418. Its totient is φ = 55371800.

The previous prime is 121818197. The next prime is 121818217. The reversal of 121818202 is 202818121.

It can be written as a sum of positive squares in only one way, i.e., 121242121 + 576081 = 11011^2 + 759^2 .

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 251449 + ... + 251932.

Almost surely, 2^121818202 is an apocalyptic number.

121818202 is a deficient number, since it is larger than the sum of its proper divisors (79031216).

121818202 is a wasteful number, since it uses less digits than its factorization.

121818202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503405 (or 503394 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 121818202 is about 11037.1283402885. The cubic root of 121818202 is about 495.7210889646.

The spelling of 121818202 in words is "one hundred twenty-one million, eight hundred eighteen thousand, two hundred two".