2001320012 has 12 divisors (see below), whose sum is σ = 3529046136. Its totient is φ = 993021120.

The previous prime is 2001320011. The next prime is 2001320021. The reversal of 2001320012 is 2100231002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001319975 and 2001320002.

It is not an unprimeable number, because it can be changed into a prime (2001320011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1909133 + ... + 1910180.

It is an arithmetic number, because the mean of its divisors is an integer number (294087178).

Almost surely, 2^2001320012 is an apocalyptic number.

It is an amenable number.

2001320012 is a deficient number, since it is larger than the sum of its proper divisors (1527726124).

2001320012 is a wasteful number, since it uses less digits than its factorization.

2001320012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3819448 (or 3819446 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2001320012 is about 44736.1152984923. The cubic root of 2001320012 is about 1260.1981740868.

Adding to 2001320012 its reverse (2100231002), we get a palindrome (4101551014).

The spelling of 2001320012 in words is "two billion, one million, three hundred twenty thousand, twelve".