12000121112 has 32 divisors (see below), whose sum is σ = 26312563200. Its totient is φ = 5023305504.

The previous prime is 12000121079. The next prime is 12000121123. The reversal of 12000121112 is 21112100021.

It is a junction number, because it is equal to n+sod(n) for n = 12000121093 and 12000121102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2489312 + ... + 2494127.

It is an arithmetic number, because the mean of its divisors is an integer number (822267600).

Almost surely, 2^12000121112 is an apocalyptic number.

It is an amenable number.

12000121112 is an abundant number, since it is smaller than the sum of its proper divisors (14312442088).

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

12000121112 is a wasteful number, since it uses less digits than its factorization.

12000121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4983495 (or 4983491 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12000121112 its reverse (21112100021), we get a palindrome (33112221133).

The spelling of 12000121112 in words is "twelve billion, one hundred twenty-one thousand, one hundred twelve".