12121220100112 has 20 divisors (see below), whose sum is σ = 23526577751760. Its totient is φ = 6049845196448.

The previous prime is 12121220100089. The next prime is 12121220100127. The reversal of 12121220100112 is 21100102212121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 672794062 + ... + 672812077.

It is an arithmetic number, because the mean of its divisors is an integer number (1176328887588).

Almost surely, 2^{12121220100112} is an apocalyptic number.

It is an amenable number.

12121220100112 is a deficient number, since it is larger than the sum of its proper divisors (11405357651648).

12121220100112 is a wasteful number, since it uses less digits than its factorization.

12121220100112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345606710 (or 1345606704 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 12121220100112 its reverse (21100102212121), we get a palindrome (33221322312233).

The spelling of 12121220100112 in words is "twelve trillion, one hundred twenty-one billion, two hundred twenty million, one hundred thousand, one hundred twelve".