1000101109991 has 2 divisors, whose sum is σ = 1000101109992. Its totient is φ = 1000101109990.

The previous prime is 1000101109961. The next prime is 1000101110059. The reversal of 1000101109991 is 1999011010001.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1000101109991 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1000101109951) 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, 500050554995 + 500050554996.

It is an arithmetic number, because the mean of its divisors is an integer number (500050554996).

Almost surely, 2^{1000101109991} is an apocalyptic number.

1000101109991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1000101109991 is an equidigital number, since it uses as much as digits as its factorization.

1000101109991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 729, while the sum is 32.

Adding to 1000101109991 its reverse (1999011010001), we get a palindrome (2999112119992).

The spelling of 1000101109991 in words is "one trillion, one hundred one million, one hundred nine thousand, nine hundred ninety-one".