201121211112 has 32 divisors (see below), whose sum is σ = 504322090080. Its totient is φ = 66837862080.

The previous prime is 201121211111. The next prime is 201121211117. The reversal of 201121211112 is 211112121102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 201121211091 and 201121211100.

It is not an unprimeable number, because it can be changed into a prime (201121211111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12650743 + ... + 12666630.

It is an arithmetic number, because the mean of its divisors is an integer number (15760065315).

Almost surely, 2^201121211112 is an apocalyptic number.

It is an amenable number.

201121211112 is an abundant number, since it is smaller than the sum of its proper divisors (303200878968).

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

201121211112 is a wasteful number, since it uses less digits than its factorization.

201121211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25317713 (or 25317709 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 201121211112 its reverse (211112121102), we get a palindrome (412233332214).

The spelling of 201121211112 in words is "two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, one hundred twelve".