12042121112 has 64 divisors (see below), whose sum is σ = 27189043200. Its totient is φ = 4884537600.

The previous prime is 12042121097. The next prime is 12042121123. The reversal of 12042121112 is 21112124021.

12042121112 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×12042121112² (a number of 21 digits) contains 22 as substring.

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, 1219748 + ... + 1229580.

It is an arithmetic number, because the mean of its divisors is an integer number (424828800).

Almost surely, 2^12042121112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12042121112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13594521600).

12042121112 is an abundant number, since it is smaller than the sum of its proper divisors (15146922088).

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

12042121112 is a wasteful number, since it uses less digits than its factorization.

12042121112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11016 (or 11012 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12042121112 its reverse (21112124021), we get a palindrome (33154245133).

The spelling of 12042121112 in words is "twelve billion, forty-two million, one hundred twenty-one thousand, one hundred twelve".