1001109999979 has 2 divisors, whose sum is σ = 1001109999980. Its totient is φ = 1001109999978.

The previous prime is 1001109999973. The next prime is 1001110000013. The reversal of 1001109999979 is 9799999011001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001109999979 - 2¹⁷ = 1001109868907 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1001109999979.

It is not a weakly prime, because it can be changed into another prime (1001109999973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500554999989 + 500554999990.

It is an arithmetic number, because the mean of its divisors is an integer number (500554999990).

Almost surely, 2^{1001109999979} is an apocalyptic number.

1001109999979 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001109999979 is an equidigital number, since it uses as much as digits as its factorization.

1001109999979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3720087, while the sum is 64.

The spelling of 1001109999979 in words is "one trillion, one billion, one hundred nine million, nine hundred ninety-nine thousand, nine hundred seventy-nine".