201221011221112 has 32 divisors (see below), whose sum is σ = 377338585579200. Its totient is φ = 100597389379200.

The previous prime is 201221011221091. The next prime is 201221011221149. The reversal of 201221011221112 is 211122110122102.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 201221011221112.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 2271303937 + ... + 2271392527.

It is an arithmetic number, because the mean of its divisors is an integer number (11791830799350).

Almost surely, 2^{201221011221112} is an apocalyptic number.

It is an amenable number.

201221011221112 is a deficient number, since it is larger than the sum of its proper divisors (176117574358088).

201221011221112 is a wasteful number, since it uses less digits than its factorization.

201221011221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122407 (or 122403 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 201221011221112 its reverse (211122110122102), we get a palindrome (412343121343214).

The spelling of 201221011221112 in words is "two hundred one trillion, two hundred twenty-one billion, eleven million, two hundred twenty-one thousand, one hundred twelve".