201221211211112 has 16 divisors (see below), whose sum is σ = 381025313309700. Its totient is φ = 99614460995200.

The previous prime is 201221211211061. The next prime is 201221211211127. The reversal of 201221211211112 is 211112112122102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 135432663102916 + 65788548108196 = 11637554^2 + 8111014^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124518075437 + ... + 124518077052.

Almost surely, 2^{201221211211112} is an apocalyptic number.

It is an amenable number.

201221211211112 is a deficient number, since it is larger than the sum of its proper divisors (179804102098588).

201221211211112 is a wasteful number, since it uses less digits than its factorization.

201221211211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249036152596 (or 249036152592 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 20.

Adding to 201221211211112 its reverse (211112112122102), we get a palindrome (412333323333214).

The spelling of 201221211211112 in words is "two hundred one trillion, two hundred twenty-one billion, two hundred eleven million, two hundred eleven thousand, one hundred twelve".