1001111019943 has 2 divisors, whose sum is σ = 1001111019944. Its totient is φ = 1001111019942.

The previous prime is 1001111019913. The next prime is 1001111020009. The reversal of 1001111019943 is 3499101111001.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001111019943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001111019913) 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 as a sum of consecutive naturals, namely, 500555509971 + 500555509972.

It is an arithmetic number, because the mean of its divisors is an integer number (500555509972).

Almost surely, 2^{1001111019943} is an apocalyptic number.

1001111019943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001111019943 is an equidigital number, since it uses as much as digits as its factorization.

1001111019943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 31.

The spelling of 1001111019943 in words is "one trillion, one billion, one hundred eleven million, nineteen thousand, nine hundred forty-three".