201221221112 has 16 divisors (see below), whose sum is σ = 393693693840. Its totient is φ = 96236236096.

The previous prime is 201221221111. The next prime is 201221221129. The reversal of 201221221112 is 211122122102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201221221111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546796613 + ... + 546796980.

It is an arithmetic number, because the mean of its divisors is an integer number (24605855865).

Almost surely, 2^201221221112 is an apocalyptic number.

It is an amenable number.

201221221112 is a deficient number, since it is larger than the sum of its proper divisors (192472472728).

201221221112 is a wasteful number, since it uses less digits than its factorization.

201221221112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1093593622 (or 1093593618 counting only the distinct ones).

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

Adding to 201221221112 its reverse (211122122102), we get a palindrome (412343343214).

The spelling of 201221221112 in words is "two hundred one billion, two hundred twenty-one million, two hundred twenty-one thousand, one hundred twelve".