2001231220012 has 96 divisors (see below), whose sum is σ = 3864696998400. Its totient is φ = 902518848000.

The previous prime is 2001231220007. The next prime is 2001231220013. The reversal of 2001231220012 is 2100221321002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2001231220013) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351028762 + ... + 351034462.

It is an arithmetic number, because the mean of its divisors is an integer number (40257260400).

Almost surely, 2^{2001231220012} is an apocalyptic number.

It is an amenable number.

2001231220012 is a deficient number, since it is larger than the sum of its proper divisors (1863465778388).

2001231220012 is a wasteful number, since it uses less digits than its factorization.

2001231220012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6647 (or 6645 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 2001231220012 its reverse (2100221321002), we get a palindrome (4101452541014).

The spelling of 2001231220012 in words is "two trillion, one billion, two hundred thirty-one million, two hundred twenty thousand, twelve".