2001021204 has 96 divisors (see below), whose sum is σ = 5788303360. Its totient is φ = 523905408.

The previous prime is 2001021181. The next prime is 2001021223. The reversal of 2001021204 is 4021201002.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2001021204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 145197 + ... + 158379.

Almost surely, 2^2001021204 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2001021204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2894151680).

2001021204 is an abundant number, since it is smaller than the sum of its proper divisors (3787282156).

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

2001021204 is a wasteful number, since it uses less digits than its factorization.

2001021204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13349 (or 13347 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2001021204 is about 44732.7755007444. The cubic root of 2001021204 is about 1260.1354528101.

Adding to 2001021204 its reverse (4021201002), we get a palindrome (6022222206).

It can be divided in two parts, 20010 and 21204, that added together give a palindrome (41214).

The spelling of 2001021204 in words is "two billion, one million, twenty-one thousand, two hundred four".