2001211212012 has 24 divisors (see below), whose sum is σ = 4669519680000. Its totient is φ = 667066568016.

The previous prime is 2001211211971. The next prime is 2001211212019. The reversal of 2001211212012 is 2102121121002.

It is a junction number, because it is equal to n+sod(n) for n = 2001211211982 and 2001211212000.

It is not an unprimeable number, because it can be changed into a prime (2001211212019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2372989 + ... + 3103787.

It is an arithmetic number, because the mean of its divisors is an integer number (194563320000).

Almost surely, 2^{2001211212012} is an apocalyptic number.

It is an amenable number.

2001211212012 is an abundant number, since it is smaller than the sum of its proper divisors (2668308467988).

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

2001211212012 is a wasteful number, since it uses less digits than its factorization.

2001211212012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 959005 (or 959003 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2001211212012 its reverse (2102121121002), we get a palindrome (4103332333014).

The spelling of 2001211212012 in words is "two trillion, one billion, two hundred eleven million, two hundred twelve thousand, twelve".