12021112012 has 96 divisors (see below), whose sum is σ = 28606943232. Its totient is φ = 4281209856.

The previous prime is 12021112009. The next prime is 12021112021. The reversal of 12021112012 is 21021112021.

It is a super-3 number, since 3×12021112012³ (a number of 31 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 12021111983 and 12021112001.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100093 + ... + 184555.

It is an arithmetic number, because the mean of its divisors is an integer number (297988992).

Almost surely, 2^12021112012 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 12021112012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14303471616).

12021112012 is an abundant number, since it is smaller than the sum of its proper divisors (16585831220).

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

12021112012 is a wasteful number, since it uses less digits than its factorization.

12021112012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84527 (or 84525 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12021112012 its reverse (21021112021), we get a palindrome (33042224033).

Subtracting 12021112012 from its reverse (21021112021), we obtain a palindrome (9000000009).

The spelling of 12021112012 in words is "twelve billion, twenty-one million, one hundred twelve thousand, twelve".