12112101120021 has 32 divisors (see below), whose sum is σ = 18524303416320. Its totient is φ = 6895794242304.

The previous prime is 12112101119999. The next prime is 12112101120029. The reversal of 12112101120021 is 12002110121121.

It is a happy number.

It is not a de Polignac number, because 12112101120021 - 2²³ = 12112092731413 is a prime.

It is a super-2 number, since 2×12112101120021² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12112101120029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44192221 + ... + 44465453.

It is an arithmetic number, because the mean of its divisors is an integer number (578884481760).

Almost surely, 2^{12112101120021} is an apocalyptic number.

It is an amenable number.

12112101120021 is a deficient number, since it is larger than the sum of its proper divisors (6412202296299).

12112101120021 is a wasteful number, since it uses less digits than its factorization.

12112101120021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280985.

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

Adding to 12112101120021 its reverse (12002110121121), we get a palindrome (24114211241142).

The spelling of 12112101120021 in words is "twelve trillion, one hundred twelve billion, one hundred one million, one hundred twenty thousand, twenty-one".