2003231221 has 4 divisors (see below), whose sum is σ = 2003813152. Its totient is φ = 2002649292.

The previous prime is 2003231149. The next prime is 2003231291. The reversal of 2003231221 is 1221323002.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2003231221 - 2¹⁵ = 2003198453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2003231195 and 2003231204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2003231291) 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, 285771 + ... + 292696.

It is an arithmetic number, because the mean of its divisors is an integer number (500953288).

Almost surely, 2^2003231221 is an apocalyptic number.

It is an amenable number.

2003231221 is a deficient number, since it is larger than the sum of its proper divisors (581931).

2003231221 is an equidigital number, since it uses as much as digits as its factorization.

2003231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 581930.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 2003231221 is about 44757.4711193562. The cubic root of 2003231221 is about 1260.5991987102.

Adding to 2003231221 its reverse (1221323002), we get a palindrome (3224554223).

The spelling of 2003231221 in words is "two billion, three million, two hundred thirty-one thousand, two hundred twenty-one".