201221112212 has 24 divisors (see below), whose sum is σ = 359069622912. Its totient is φ = 98645450400.

The previous prime is 201221112163. The next prime is 201221112223. The reversal of 201221112212 is 212211122102.

201221112212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 1905848 + ... + 2008655.

It is an arithmetic number, because the mean of its divisors is an integer number (14961234288).

Almost surely, 2^201221112212 is an apocalyptic number.

It is an amenable number.

201221112212 is a deficient number, since it is larger than the sum of its proper divisors (157848510700).

201221112212 is a wasteful number, since it uses less digits than its factorization.

201221112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3914759 (or 3914757 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 201221112212 its reverse (212211122102), we get a palindrome (413432234314).

The spelling of 201221112212 in words is "two hundred one billion, two hundred twenty-one million, one hundred twelve thousand, two hundred twelve".