2002031221 has 4 divisors (see below), whose sum is σ = 2031912352. Its totient is φ = 1972150092.

The previous prime is 2002031219. The next prime is 2002031257. The reversal of 2002031221 is 1221302002.

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 not a de Polignac number, because 2002031221 - 2¹ = 2002031219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002031821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14940465 + ... + 14940598.

It is an arithmetic number, because the mean of its divisors is an integer number (507978088).

Almost surely, 2^2002031221 is an apocalyptic number.

It is an amenable number.

2002031221 is a deficient number, since it is larger than the sum of its proper divisors (29881131).

2002031221 is an equidigital number, since it uses as much as digits as its factorization.

2002031221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29881130.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2002031221 is about 44744.0635280257. The cubic root of 2002031221 is about 1260.3474352628.

Adding to 2002031221 its reverse (1221302002), we get a palindrome (3223333223).

The spelling of 2002031221 in words is "two billion, two million, thirty-one thousand, two hundred twenty-one".