2003013031021 has 4 divisors (see below), whose sum is σ = 2005150719292. Its totient is φ = 2000875342752.

The previous prime is 2003013031003. The next prime is 2003013031037. The reversal of 2003013031021 is 1201303103002.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 634906176100 + 1368106854921 = 796810^2 + 1169661^2 .

It is a cyclic number.

It is not a de Polignac number, because 2003013031021 - 2⁹ = 2003013030509 is a prime.

It is a super-2 number, since 2×2003013031021² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003013030986 and 2003013031004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003013031091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1068842730 + ... + 1068844603.

It is an arithmetic number, because the mean of its divisors is an integer number (501287679823).

Almost surely, 2^{2003013031021} is an apocalyptic number.

It is an amenable number.

2003013031021 is a deficient number, since it is larger than the sum of its proper divisors (2137688271).

2003013031021 is an equidigital number, since it uses as much as digits as its factorization.

2003013031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2137688270.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 2003013031021 its reverse (1201303103002), we get a palindrome (3204316134023).

The spelling of 2003013031021 in words is "two trillion, three billion, thirteen million, thirty-one thousand, twenty-one".