121200021220012 has 12 divisors (see below), whose sum is σ = 242400042440080. Its totient is φ = 51942866237136.

The previous prime is 121200021220009. The next prime is 121200021220021. The reversal of 121200021220012 is 210022120002121.

It is a happy number.

121200021220012 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164286093187 + ... + 2164286093242.

Almost surely, 2^{121200021220012} is an apocalyptic number.

It is an amenable number.

121200021220012 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

121200021220012 is a wasteful number, since it uses less digits than its factorization.

121200021220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328572186440 (or 4328572186438 counting only the distinct ones).

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

Adding to 121200021220012 its reverse (210022120002121), we get a palindrome (331222141222133).

The spelling of 121200021220012 in words is "one hundred twenty-one trillion, two hundred billion, twenty-one million, two hundred twenty thousand, twelve".