2002021321 has 4 divisors (see below), whose sum is σ = 2002413952. Its totient is φ = 2001628692.

The previous prime is 2002021319. The next prime is 2002021327. The reversal of 2002021321 is 1231202002.

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 2002021321 - 2¹ = 2002021319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2002021327) 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, 188565 + ... + 198898.

It is an arithmetic number, because the mean of its divisors is an integer number (500603488).

Almost surely, 2^2002021321 is an apocalyptic number.

It is an amenable number.

2002021321 is a deficient number, since it is larger than the sum of its proper divisors (392631).

2002021321 is an equidigital number, since it uses as much as digits as its factorization.

2002021321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392630.

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

The square root of 2002021321 is about 44743.9528986879. The cubic root of 2002021321 is about 1260.3453577960.

Adding to 2002021321 its reverse (1231202002), we get a palindrome (3233223323).

The spelling of 2002021321 in words is "two billion, two million, twenty-one thousand, three hundred twenty-one".