201121102121112 has 24 divisors (see below), whose sum is σ = 544702984911540. Its totient is φ = 67040367373680.

The previous prime is 201121102121089. The next prime is 201121102121117. The reversal of 201121102121112 is 211121201121102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×201121102121112² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201121102121117) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1396674320214 + ... + 1396674320357.

Almost surely, 2^{201121102121112} is an apocalyptic number.

It is an amenable number.

201121102121112 is an abundant number, since it is smaller than the sum of its proper divisors (343581882790428).

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

201121102121112 is a wasteful number, since it uses less digits than its factorization.

201121102121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793348640583 (or 2793348640576 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 201121102121112 its reverse (211121201121102), we get a palindrome (412242303242214).

It can be divided in two parts, 20112110 and 2121112, that added together give a palindrome (22233222).

The spelling of 201121102121112 in words is "two hundred one trillion, one hundred twenty-one billion, one hundred two million, one hundred twenty-one thousand, one hundred twelve".