12122121210112 has 72 divisors (see below), whose sum is σ = 26216056744416. Its totient is φ = 5571864109056.

The previous prime is 12122121209999. The next prime is 12122121210137. The reversal of 12122121210112 is 21101212122121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122121210112.

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 7 ways as a sum of consecutive naturals, for example, 32201398 + ... + 32575669.

It is an arithmetic number, because the mean of its divisors is an integer number (364111899228).

Almost surely, 2^{12122121210112} is an apocalyptic number.

It is an amenable number.

12122121210112 is an abundant number, since it is smaller than the sum of its proper divisors (14093935534304).

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

12122121210112 is an equidigital number, since it uses as much as digits as its factorization.

12122121210112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64777143 (or 64777129 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12122121210112 its reverse (21101212122121), we get a palindrome (33223333332233).

The spelling of 12122121210112 in words is "twelve trillion, one hundred twenty-two billion, one hundred twenty-one million, two hundred ten thousand, one hundred twelve".