20212121200012 has 36 divisors (see below), whose sum is σ = 41146360162320. Its totient is φ = 8662283701344.

The previous prime is 20212121200009. The next prime is 20212121200013. The reversal of 20212121200012 is 21000212121202.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20212121200013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61814689 + ... + 62140807.

Almost surely, 2^{20212121200012} is an apocalyptic number.

It is an amenable number.

20212121200012 is an abundant number, since it is smaller than the sum of its proper divisors (20934238962308).

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

20212121200012 is a wasteful number, since it uses less digits than its factorization.

20212121200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642350 (or 642341 counting only the distinct ones).

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

Adding to 20212121200012 its reverse (21000212121202), we get a palindrome (41212333321214).

The spelling of 20212121200012 in words is "twenty trillion, two hundred twelve billion, one hundred twenty-one million, two hundred thousand, twelve".