12112111220121 has 12 divisors (see below), whose sum is σ = 19085751013680. Its totient is φ = 7340673466680.

The previous prime is 12112111220093. The next prime is 12112111220173. The reversal of 12112111220121 is 12102211121121.

It is a happy number.

12112111220121 is a `hidden beast` number, since 1 + 211 + 2 + 111 + 220 + 121 = 666.

It is not a de Polignac number, because 12112111220121 - 2⁶ = 12112111220057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12112111220094 and 12112111220103.

It is not an unprimeable number, because it can be changed into a prime (12112111220821) 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 11 ways as a sum of consecutive naturals, for example, 61172278791 + ... + 61172278988.

It is an arithmetic number, because the mean of its divisors is an integer number (1590479251140).

Almost surely, 2^{12112111220121} is an apocalyptic number.

12112111220121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12112111220121 is a deficient number, since it is larger than the sum of its proper divisors (6973639793559).

12112111220121 is a wasteful number, since it uses less digits than its factorization.

12112111220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122344557796 (or 122344557793 counting only the distinct ones).

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

Adding to 12112111220121 its reverse (12102211121121), we get a palindrome (24214322341242).

The spelling of 12112111220121 in words is "twelve trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty-one".