20121232012 has 48 divisors (see below), whose sum is σ = 41124283200. Its totient is φ = 8610672000.

The previous prime is 20121232007. The next prime is 20121232039. The reversal of 20121232012 is 21023212102.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 951312 + ... + 972232.

It is an arithmetic number, because the mean of its divisors is an integer number (856755900).

Almost surely, 2^20121232012 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 20121232012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20562141600).

20121232012 is an abundant number, since it is smaller than the sum of its proper divisors (21003051188).

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

20121232012 is a wasteful number, since it uses less digits than its factorization.

20121232012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21647 (or 21631 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20121232012 its reverse (21023212102), we get a palindrome (41144444114).

The spelling of 20121232012 in words is "twenty billion, one hundred twenty-one million, two hundred thirty-two thousand, twelve".