1002221021321 has 16 divisors (see below), whose sum is σ = 1093236587520. Its totient is φ = 913256907840.

The previous prime is 1002221021317. The next prime is 1002221021341. The reversal of 1002221021321 is 1231201222001.

It is a cyclic number.

It is not a de Polignac number, because 1002221021321 - 2² = 1002221021317 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1002221021321.

It is not an unprimeable number, because it can be changed into a prime (1002221021341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 920945 + ... + 1688958.

It is an arithmetic number, because the mean of its divisors is an integer number (68327286720).

Almost surely, 2^{1002221021321} is an apocalyptic number.

It is an amenable number.

1002221021321 is a deficient number, since it is larger than the sum of its proper divisors (91015566199).

1002221021321 is a wasteful number, since it uses less digits than its factorization.

1002221021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2610296.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1002221021321 its reverse (1231201222001), we get a palindrome (2233422243322).

The spelling of 1002221021321 in words is "one trillion, two billion, two hundred twenty-one million, twenty-one thousand, three hundred twenty-one".