1001031320321 has 16 divisors (see below), whose sum is σ = 1086351957504. Its totient is φ = 918720278784.

The previous prime is 1001031320279. The next prime is 1001031320441. The reversal of 1001031320321 is 1230231301001.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001031320321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

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 1001031320321.

It is not an unprimeable number, because it can be changed into a prime (1001031328321) 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, 684290 + ... + 1571723.

It is an arithmetic number, because the mean of its divisors is an integer number (67896997344).

Almost surely, 2^{1001031320321} is an apocalyptic number.

It is an amenable number.

1001031320321 is a deficient number, since it is larger than the sum of its proper divisors (85320637183).

1001031320321 is a wasteful number, since it uses less digits than its factorization.

1001031320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2256680.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 1001031320321 its reverse (1230231301001), we get a palindrome (2231262621322).

The spelling of 1001031320321 in words is "one trillion, one billion, thirty-one million, three hundred twenty thousand, three hundred twenty-one".