212121200012 has 6 divisors (see below), whose sum is σ = 371212100028. Its totient is φ = 106060600004.

The previous prime is 212121199937. The next prime is 212121200041. The reversal of 212121200012 is 210002121212.

It is a self number, because there is not a number n which added to its sum of digits gives 212121200012.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 26515149998 + ... + 26515150005.

It is an arithmetic number, because the mean of its divisors is an integer number (61868683338).

Almost surely, 2^212121200012 is an apocalyptic number.

It is an amenable number.

212121200012 is a deficient number, since it is larger than the sum of its proper divisors (159090900016).

212121200012 is a wasteful number, since it uses less digits than its factorization.

212121200012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53030300007 (or 53030300005 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212121200012 its reverse (210002121212), we get a palindrome (422123321224).

The spelling of 212121200012 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred thousand, twelve".