2001321002 has 8 divisors (see below), whose sum is σ = 3098819712. Its totient is φ = 968381100.

The previous prime is 2001320989. The next prime is 2001321019. The reversal of 2001321002 is 2001231002.

It is a happy number.

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

It is an unprimeable number.

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, 16139624 + ... + 16139747.

It is an arithmetic number, because the mean of its divisors is an integer number (387352464).

Almost surely, 2^2001321002 is an apocalyptic number.

2001321002 is a deficient number, since it is larger than the sum of its proper divisors (1097498710).

2001321002 is a wasteful number, since it uses less digits than its factorization.

2001321002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32279404.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 2001321002 is about 44736.1263633766. The cubic root of 2001321002 is about 1260.1983818823.

Adding to 2001321002 its reverse (2001231002), we get a palindrome (4002552004).

Subtracting from 2001321002 its reverse (2001231002), we obtain a square (90000 = 300²).

The spelling of 2001321002 in words is "two billion, one million, three hundred twenty-one thousand, two".