2002121321 has 8 divisors (see below), whose sum is σ = 2037292224. Its totient is φ = 1967026320.

The previous prime is 2002121309. The next prime is 2002121351. The reversal of 2002121321 is 1231212002.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2002121321 - 2¹⁰ = 2002120297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002121296 and 2002121305.

It is not an unprimeable number, because it can be changed into a prime (2002121351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35606 + ... + 72608.

It is an arithmetic number, because the mean of its divisors is an integer number (254661528).

Almost surely, 2^2002121321 is an apocalyptic number.

It is an amenable number.

2002121321 is a deficient number, since it is larger than the sum of its proper divisors (35170903).

2002121321 is an equidigital number, since it uses as much as digits as its factorization.

2002121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37951.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2002121321 is about 44745.0703541742. The cubic root of 2002121321 is about 1260.3663419943.

Adding to 2002121321 its reverse (1231212002), we get a palindrome (3233333323).

The spelling of 2002121321 in words is "two billion, two million, one hundred twenty-one thousand, three hundred twenty-one".