2001220012004 has 24 divisors (see below), whose sum is σ = 3510939333888. Its totient is φ = 998095387520.

The previous prime is 2001220011983. The next prime is 2001220012013. The reversal of 2001220012004 is 4002100221002.

It is a self number, because there is not a number n which added to its sum of digits gives 2001220012004.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9022457 + ... + 9241599.

It is an arithmetic number, because the mean of its divisors is an integer number (146289138912).

Almost surely, 2^{2001220012004} is an apocalyptic number.

It is an amenable number.

2001220012004 is a deficient number, since it is larger than the sum of its proper divisors (1509719321884).

2001220012004 is a wasteful number, since it uses less digits than its factorization.

2001220012004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224875 (or 224873 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 2001220012004 its reverse (4002100221002), we get a palindrome (6003320233006).

The spelling of 2001220012004 in words is "two trillion, one billion, two hundred twenty million, twelve thousand, four".