2001323012 has 72 divisors (see below), whose sum is σ = 4001147136. Its totient is φ = 873759744.

The previous prime is 2001322997. The next prime is 2001323039. The reversal of 2001323012 is 2103231002.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1507493 + ... + 1508819.

It is an arithmetic number, because the mean of its divisors is an integer number (55571488).

Almost surely, 2^2001323012 is an apocalyptic number.

It is an amenable number.

2001323012 is a deficient number, since it is larger than the sum of its proper divisors (1999824124).

2001323012 is a wasteful number, since it uses less digits than its factorization.

2001323012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477 (or 1462 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2001323012 is about 44736.1488284363. The cubic root of 2001323012 is about 1260.1988037699.

Adding to 2001323012 its reverse (2103231002), we get a palindrome (4104554014).

The spelling of 2001323012 in words is "two billion, one million, three hundred twenty-three thousand, twelve".