2001220012012 has 48 divisors (see below), whose sum is σ = 3994026079680. Its totient is φ = 869168627712.

The previous prime is 2001220011983. The next prime is 2001220012013. The reversal of 2001220012012 is 2102100221002.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 2001220011983 and 2001220012001.

It is not an unprimeable number, because it can be changed into a prime (2001220012013) by changing a digit.

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, 5423289 + ... + 5780527.

It is an arithmetic number, because the mean of its divisors is an integer number (83208876660).

Almost surely, 2^{2001220012012} is an apocalyptic number.

It is an amenable number.

2001220012012 is a deficient number, since it is larger than the sum of its proper divisors (1992806067668).

2001220012012 is a wasteful number, since it uses less digits than its factorization.

2001220012012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363610 (or 363608 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001220012012 its reverse (2102100221002), we get a palindrome (4103320233014).

The spelling of 2001220012012 in words is "two trillion, one billion, two hundred twenty million, twelve thousand, twelve".