2001221112012 has 48 divisors (see below), whose sum is σ = 5019860375040. Its totient is φ = 618518503872.

The previous prime is 2001221112001. The next prime is 2001221112043. The reversal of 2001221112012 is 2102111221002.

It is a junction number, because it is equal to n+sod(n) for n = 2001221111982 and 2001221112000.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 93364663 + ... + 93386094.

It is an arithmetic number, because the mean of its divisors is an integer number (104580424480).

Almost surely, 2^{2001221112012} is an apocalyptic number.

It is an amenable number.

2001221112012 is an abundant number, since it is smaller than the sum of its proper divisors (3018639263028).

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

2001221112012 is a wasteful number, since it uses less digits than its factorization.

2001221112012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186750830 (or 186750828 counting only the distinct ones).

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

Adding to 2001221112012 its reverse (2102111221002), we get a palindrome (4103332333014).

The spelling of 2001221112012 in words is "two trillion, one billion, two hundred twenty-one million, one hundred twelve thousand, twelve".