201121210112 has 72 divisors (see below), whose sum is σ = 425279341200. Its totient is φ = 94660780032.

The previous prime is 201121210057. The next prime is 201121210141. The reversal of 201121210112 is 211012121102.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 631964 + ... + 895332.

Almost surely, 2^201121210112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201121210112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212639670600).

201121210112 is an abundant number, since it is smaller than the sum of its proper divisors (224158131088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201121210112 is a wasteful number, since it uses less digits than its factorization.

201121210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263561 (or 263547 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 201121210112 its reverse (211012121102), we get a palindrome (412133331214).

The spelling of 201121210112 in words is "two hundred one billion, one hundred twenty-one million, two hundred ten thousand, one hundred twelve".