2172066012 has 72 divisors (see below), whose sum is σ = 5696308800. Its totient is φ = 697027968.

The previous prime is 2172066011. The next prime is 2172066031. The reversal of 2172066012 is 2106602712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172066011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 380314 + ... + 385982.

It is an arithmetic number, because the mean of its divisors is an integer number (79115400).

Almost surely, 2^2172066012 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 2172066012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2848154400).

2172066012 is an abundant number, since it is smaller than the sum of its proper divisors (3524242788).

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

2172066012 is a wasteful number, since it uses less digits than its factorization.

2172066012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6075 (or 6070 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 2172066012 is about 46605.4289970600. The cubic root of 2172066012 is about 1295.0633306834.

Adding to 2172066012 its reverse (2106602712), we get a palindrome (4278668724).

The spelling of 2172066012 in words is "two billion, one hundred seventy-two million, sixty-six thousand, twelve".