2003321421 has 24 divisors (see below), whose sum is σ = 3031392000. Its totient is φ = 1273158432.

The previous prime is 2003321399. The next prime is 2003321443. The reversal of 2003321421 is 1241233002.

It is an interprime number because it is at equal distance from previous prime (2003321399) and next prime (2003321443).

It is not a de Polignac number, because 2003321421 - 2⁹ = 2003320909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2003321394 and 2003321403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003321461) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27961 + ... + 69198.

It is an arithmetic number, because the mean of its divisors is an integer number (126308000).

Almost surely, 2^2003321421 is an apocalyptic number.

It is an amenable number.

2003321421 is a deficient number, since it is larger than the sum of its proper divisors (1028070579).

2003321421 is a wasteful number, since it uses less digits than its factorization.

2003321421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97273 (or 97270 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2003321421 is about 44758.4787610124. The cubic root of 2003321421 is about 1260.6181188662.

Adding to 2003321421 its reverse (1241233002), we get a palindrome (3244554423).

The spelling of 2003321421 in words is "two billion, three million, three hundred twenty-one thousand, four hundred twenty-one".