2003321013021 has 6 divisors (see below), whose sum is σ = 2893685907710. Its totient is φ = 1335547342008.

The previous prime is 2003321013013. The next prime is 2003321013073. The reversal of 2003321013021 is 1203101233002.

2003321013021 is a `hidden beast` number, since 20 + 0 + 332 + 10 + 1 + 302 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1383589940121 + 619731072900 = 1176261^2 + 787230^2 .

It is not a de Polignac number, because 2003321013021 - 2³ = 2003321013013 is a prime.

It is a super-2 number, since 2×2003321013021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2003321012985 and 2003321013003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003321013821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111295611826 + ... + 111295611843.

Almost surely, 2^{2003321013021} is an apocalyptic number.

It is an amenable number.

2003321013021 is a deficient number, since it is larger than the sum of its proper divisors (890364894689).

2003321013021 is a wasteful number, since it uses less digits than its factorization.

2003321013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222591223675 (or 222591223672 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 2003321013021 its reverse (1203101233002), we get a palindrome (3206422246023).

The spelling of 2003321013021 in words is "two trillion, three billion, three hundred twenty-one million, thirteen thousand, twenty-one".