2001126132 has 144 divisors (see below), whose sum is σ = 5604318720. Its totient is φ = 599227200.

The previous prime is 2001126089. The next prime is 2001126133. The reversal of 2001126132 is 2316211002.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001126133) 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 47 ways as a sum of consecutive naturals, for example, 2060407 + ... + 2061377.

It is an arithmetic number, because the mean of its divisors is an integer number (38918880).

Almost surely, 2^2001126132 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 2001126132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2802159360).

2001126132 is an abundant number, since it is smaller than the sum of its proper divisors (3603192588).

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

2001126132 is a wasteful number, since it uses less digits than its factorization.

2001126132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1154 (or 1149 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2001126132 is about 44733.9483166867. The cubic root of 2001126132 is about 1260.1574784274.

Adding to 2001126132 its reverse (2316211002), we get a palindrome (4317337134).

The spelling of 2001126132 in words is "two billion, one million, one hundred twenty-six thousand, one hundred thirty-two".