201221201112112 has 40 divisors (see below), whose sum is σ = 395687088302336. Its totient is φ = 99108420181056.

The previous prime is 201221201112109. The next prime is 201221201112149. The reversal of 201221201112112 is 211211102122102.

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 201221201112112.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266429773 + ... + 267183955.

Almost surely, 2^{201221201112112} is an apocalyptic number.

It is an amenable number.

201221201112112 is a deficient number, since it is larger than the sum of its proper divisors (194465887190224).

201221201112112 is a wasteful number, since it uses less digits than its factorization.

201221201112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003145 (or 1003139 counting only the distinct ones).

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

Adding to 201221201112112 its reverse (211211102122102), we get a palindrome (412432303234214).

The spelling of 201221201112112 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred one million, one hundred twelve thousand, one hundred twelve".