2001321332 has 6 divisors (see below), whose sum is σ = 3502312338. Its totient is φ = 1000660664.

The previous prime is 2001321317. The next prime is 2001321337. The reversal of 2001321332 is 2331231002.

It can be written as a sum of positive squares in only one way, i.e., 1957708516 + 43612816 = 44246^2 + 6604^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2001321332.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001321337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250165163 + ... + 250165170.

It is an arithmetic number, because the mean of its divisors is an integer number (583718723).

Almost surely, 2^2001321332 is an apocalyptic number.

It is an amenable number.

2001321332 is a deficient number, since it is larger than the sum of its proper divisors (1500991006).

2001321332 is a wasteful number, since it uses less digits than its factorization.

2001321332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500330337 (or 500330335 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 2001321332 is about 44736.1300516708. The cubic root of 2001321332 is about 1260.1984511474.

Adding to 2001321332 its reverse (2331231002), we get a palindrome (4332552334).

The spelling of 2001321332 in words is "two billion, one million, three hundred twenty-one thousand, three hundred thirty-two".