1021000020321 has 8 divisors (see below), whose sum is σ = 1366394080320. Its totient is φ = 678136320272.

The previous prime is 1021000020319. The next prime is 1021000020323. The reversal of 1021000020321 is 1230200001201.

It is an interprime number because it is at equal distance from previous prime (1021000020319) and next prime (1021000020323).

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 1021000020321 - 2¹ = 1021000020319 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021000020297 and 1021000020306.

It is not an unprimeable number, because it can be changed into a prime (1021000020323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632589045 + ... + 632590658.

It is an arithmetic number, because the mean of its divisors is an integer number (170799260040).

Almost surely, 2^{1021000020321} is an apocalyptic number.

It is an amenable number.

1021000020321 is a deficient number, since it is larger than the sum of its proper divisors (345394059999).

1021000020321 is a wasteful number, since it uses less digits than its factorization.

1021000020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265179975.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 1021000020321 its reverse (1230200001201), we get a palindrome (2251200021522).

The spelling of 1021000020321 in words is "one trillion, twenty-one billion, twenty thousand, three hundred twenty-one".