12112100111121 has 32 divisors (see below), whose sum is σ = 16687850188800. Its totient is φ = 7809274281600.

The previous prime is 12112100111063. The next prime is 12112100111129. The reversal of 12112100111121 is 12111100121121.

It is not a de Polignac number, because 12112100111121 - 2¹³ = 12112100102929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12112100111121.

It is not an unprimeable number, because it can be changed into a prime (12112100111129) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5720286 + ... + 7546248.

It is an arithmetic number, because the mean of its divisors is an integer number (521495318400).

Almost surely, 2^{12112100111121} is an apocalyptic number.

It is an amenable number.

12112100111121 is a deficient number, since it is larger than the sum of its proper divisors (4575750077679).

12112100111121 is a wasteful number, since it uses less digits than its factorization.

12112100111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826477.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 12112100111121 its reverse (12111100121121), we get a palindrome (24223200232242).

The spelling of 12112100111121 in words is "twelve trillion, one hundred twelve billion, one hundred million, one hundred eleven thousand, one hundred twenty-one".