12172271020 has 96 divisors (see below), whose sum is σ = 31859251200. Its totient is φ = 3803514624.

The previous prime is 12172271011. The next prime is 12172271021. The reversal of 12172271020 is 2017227121.

12172271020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12172271021) 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 31 ways as a sum of consecutive naturals, for example, 101451 + ... + 186109.

It is an arithmetic number, because the mean of its divisors is an integer number (331867200).

Almost surely, 2^12172271020 is an apocalyptic number.

12172271020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12172271020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15929625600).

12172271020 is an abundant number, since it is smaller than the sum of its proper divisors (19686980180).

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

12172271020 is a wasteful number, since it uses less digits than its factorization.

12172271020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84767 (or 84765 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 25.

Adding to 12172271020 its reverse (2017227121), we get a palindrome (14189498141).

The spelling of 12172271020 in words is "twelve billion, one hundred seventy-two million, two hundred seventy-one thousand, twenty".