20121332312 has 32 divisors (see below), whose sum is σ = 38131002720. Its totient is φ = 9953222400.

The previous prime is 20121332303. The next prime is 20121332317. The reversal of 20121332312 is 21323312102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121332317) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1095428 + ... + 1113644.

It is an arithmetic number, because the mean of its divisors is an integer number (1191593835).

Almost surely, 2^20121332312 is an apocalyptic number.

It is an amenable number.

20121332312 is a deficient number, since it is larger than the sum of its proper divisors (18009670408).

20121332312 is a wasteful number, since it uses less digits than its factorization.

20121332312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19691 (or 19687 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 20121332312 its reverse (21323312102), we get a palindrome (41444644414).

The spelling of 20121332312 in words is "twenty billion, one hundred twenty-one million, three hundred thirty-two thousand, three hundred twelve".