1021000000320 has 168 divisors, whose sum is σ = 3544034156520. Its totient is φ = 269768724480.

The previous prime is 1021000000313. The next prime is 1021000000351. The reversal of 1021000000320 is 230000001201.

It is a happy number.

1021000000320 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 229640307264 + 791359693056 = 479208^2 + 889584^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1312291 + ... + 1940130.

Almost surely, 2^{1021000000320} is an apocalyptic number.

1021000000320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1021000000320 is an abundant number, since it is smaller than the sum of its proper divisors (2523034156200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021000000320 is a wasteful number, since it uses less digits than its factorization.

1021000000320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3252553 (or 3252540 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

Adding to 1021000000320 its reverse (230000001201), we get a palindrome (1251000001521).

The spelling of 1021000000320 in words is "one trillion, twenty-one billion, three hundred twenty", and thus it is an aban number.