1001000000501 has 2 divisors, whose sum is σ = 1001000000502. Its totient is φ = 1001000000500.

The previous prime is 1001000000471. The next prime is 1001000000531. The reversal of 1001000000501 is 1050000001001.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (1001000000471) and next prime (1001000000531).

It can be written as a sum of positive squares in only one way, i.e., 991040160100 + 9959840401 = 995510^2 + 99799^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001000000501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001000000531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500500000250 + 500500000251.

It is an arithmetic number, because the mean of its divisors is an integer number (500500000251).

Almost surely, 2^{1001000000501} is an apocalyptic number.

It is an amenable number.

1001000000501 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001000000501 is an equidigital number, since it uses as much as digits as its factorization.

1001000000501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5, while the sum is 8.

Adding to 1001000000501 its reverse (1050000001001), we get a palindrome (2051000001502).

The spelling of 1001000000501 in words is "one trillion, one billion, five hundred one", and thus it is an aban number.