2001213132 has 12 divisors (see below), whose sum is σ = 4669497336. Its totient is φ = 667071040.

The previous prime is 2001213113. The next prime is 2001213143. The reversal of 2001213132 is 2313121002.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83383869 + ... + 83383892.

It is an arithmetic number, because the mean of its divisors is an integer number (389124778).

Almost surely, 2^2001213132 is an apocalyptic number.

It is an amenable number.

2001213132 is an abundant number, since it is smaller than the sum of its proper divisors (2668284204).

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

2001213132 is a wasteful number, since it uses less digits than its factorization.

2001213132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166767768 (or 166767766 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 2001213132 is about 44734.9207219595. The cubic root of 2001213132 is about 1260.1757401635.

Adding to 2001213132 its reverse (2313121002), we get a palindrome (4314334134).

The spelling of 2001213132 in words is "two billion, one million, two hundred thirteen thousand, one hundred thirty-two".