12120022012 has 72 divisors (see below), whose sum is σ = 25664905728. Its totient is φ = 4988037600.

The previous prime is 12120022003. The next prime is 12120022049. The reversal of 12120022012 is 21022002121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12120021983 and 12120022001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 788343 + ... + 803569.

It is an arithmetic number, because the mean of its divisors is an integer number (356457024).

Almost surely, 2^12120022012 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 12120022012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12832452864).

12120022012 is an abundant number, since it is smaller than the sum of its proper divisors (13544883716).

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

12120022012 is a wasteful number, since it uses less digits than its factorization.

12120022012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15407 (or 15398 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 12120022012 its reverse (21022002121), we get a palindrome (33142024133).

The spelling of 12120022012 in words is "twelve billion, one hundred twenty million, twenty-two thousand, twelve".