211121220012 has 24 divisors (see below), whose sum is σ = 493256794800. Its totient is φ = 70282223616.

The previous prime is 211121220007. The next prime is 211121220221. The reversal of 211121220012 is 210022121112.

211121220012 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 211121219973 and 211121220000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11429937 + ... + 11448392.

It is an arithmetic number, because the mean of its divisors is an integer number (20552366450).

Almost surely, 2^211121220012 is an apocalyptic number.

It is an amenable number.

211121220012 is an abundant number, since it is smaller than the sum of its proper divisors (282135574788).

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

211121220012 is a wasteful number, since it uses less digits than its factorization.

211121220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22879105 (or 22879103 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 211121220012 its reverse (210022121112), we get a palindrome (421143341124).

The spelling of 211121220012 in words is "two hundred eleven billion, one hundred twenty-one million, two hundred twenty thousand, twelve".