1012001002543 has 2 divisors, whose sum is σ = 1012001002544. Its totient is φ = 1012001002542.

The previous prime is 1012001002531. The next prime is 1012001002549. The reversal of 1012001002543 is 3452001002101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1012001002543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1012001002543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012001002549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506000501271 + 506000501272.

It is an arithmetic number, because the mean of its divisors is an integer number (506000501272).

Almost surely, 2^{1012001002543} is an apocalyptic number.

1012001002543 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012001002543 is an equidigital number, since it uses as much as digits as its factorization.

1012001002543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 1012001002543 its reverse (3452001002101), we get a palindrome (4464002004644).

The spelling of 1012001002543 in words is "one trillion, twelve billion, one million, two thousand, five hundred forty-three".