2003221321012 has 24 divisors (see below), whose sum is σ = 3542825308680. Its totient is φ = 990991626240.

The previous prime is 2003221320953. The next prime is 2003221321043. The reversal of 2003221321012 is 2101231223002.

It can be written as a sum of positive squares in 4 ways, for example, as 1064640130596 + 938581190416 = 1031814^2 + 968804^2 .

It is a congruent number.

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, 553212 + ... + 2076652.

It is an arithmetic number, because the mean of its divisors is an integer number (147617721195).

Almost surely, 2^{2003221321012} is an apocalyptic number.

It is an amenable number.

2003221321012 is a deficient number, since it is larger than the sum of its proper divisors (1539603987668).

2003221321012 is a wasteful number, since it uses less digits than its factorization.

2003221321012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1526931 (or 1526929 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 2003221321012 its reverse (2101231223002), we get a palindrome (4104452544014).

The spelling of 2003221321012 in words is "two trillion, three billion, two hundred twenty-one million, three hundred twenty-one thousand, twelve".