121211220008 has 16 divisors (see below), whose sum is σ = 227302191060. Its totient is φ = 60597302400.

The previous prime is 121211220007. The next prime is 121211220017. The reversal of 121211220008 is 800022112121.

It can be written as a sum of positive squares in 2 ways, for example, as 120588118564 + 623101444 = 347258^2 + 24962^2 .

It is not an unprimeable number, because it can be changed into a prime (121211220007) 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 3 ways as a sum of consecutive naturals, for example, 976223 + ... + 1093358.

Almost surely, 2^121211220008 is an apocalyptic number.

It is an amenable number.

121211220008 is a deficient number, since it is larger than the sum of its proper divisors (106090971052).

121211220008 is a wasteful number, since it uses less digits than its factorization.

121211220008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076908 (or 2076904 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 121211220008 its reverse (800022112121), we get a palindrome (921233332129).

The spelling of 121211220008 in words is "one hundred twenty-one billion, two hundred eleven million, two hundred twenty thousand, eight".