1002001021321 has 16 divisors (see below), whose sum is σ = 1090774566400. Its totient is φ = 916944364800.

The previous prime is 1002001021313. The next prime is 1002001021337. The reversal of 1002001021321 is 1231201002001.

It is a cyclic number.

It is not a de Polignac number, because 1002001021321 - 2³ = 1002001021313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002001021621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1253616 + ... + 1890913.

It is an arithmetic number, because the mean of its divisors is an integer number (68173410400).

Almost surely, 2^{1002001021321} is an apocalyptic number.

It is an amenable number.

1002001021321 is a deficient number, since it is larger than the sum of its proper divisors (88773545079).

1002001021321 is a wasteful number, since it uses less digits than its factorization.

1002001021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3145120.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1002001021321 its reverse (1231201002001), we get a palindrome (2233202023322).

The spelling of 1002001021321 in words is "one trillion, two billion, one million, twenty-one thousand, three hundred twenty-one".