1002021003321 has 16 divisors (see below), whose sum is σ = 1460274010944. Its totient is φ = 607424900544.

The previous prime is 1002021003311. The next prime is 1002021003323. The reversal of 1002021003321 is 1233001202001.

It is not a de Polignac number, because 1002021003321 - 2⁹ = 1002021002809 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1002021003321.

It is not an unprimeable number, because it can be changed into a prime (1002021003323) 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, 191735046 + ... + 191740271.

It is an arithmetic number, because the mean of its divisors is an integer number (91267125684).

Almost surely, 2^{1002021003321} is an apocalyptic number.

It is an amenable number.

1002021003321 is a deficient number, since it is larger than the sum of its proper divisors (458253007623).

1002021003321 is a wasteful number, since it uses less digits than its factorization.

1002021003321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 383475400.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 1002021003321 its reverse (1233001202001), we get a palindrome (2235022205322).

The spelling of 1002021003321 in words is "one trillion, two billion, twenty-one million, three thousand, three hundred twenty-one".