12121120121112 has 64 divisors (see below), whose sum is σ = 33670114560000. Its totient is φ = 4040333000352.

The previous prime is 12121120121051. The next prime is 12121120121129. The reversal of 12121120121112 is 21112102112121.

It is a happy number.

12121120121112 is a `hidden beast` number, since 121 + 211 + 201 + 21 + 112 = 666.

It is a super-3 number, since 3×12121120121112³ (a number of 40 digits) contains 333 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 an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 27951013 + ... + 28381355.

It is an arithmetic number, because the mean of its divisors is an integer number (526095540000).

Almost surely, 2^{12121120121112} is an apocalyptic number.

12121120121112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12121120121112 is an abundant number, since it is smaller than the sum of its proper divisors (21548994438888).

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

12121120121112 is a wasteful number, since it uses less digits than its factorization.

12121120121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560757 (or 560747 counting only the distinct ones).

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

Adding to 12121120121112 its reverse (21112102112121), we get a palindrome (33233222233233).

The spelling of 12121120121112 in words is "twelve trillion, one hundred twenty-one billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twelve".