101100109991 has 2 divisors, whose sum is σ = 101100109992. Its totient is φ = 101100109990.

The previous prime is 101100109963. The next prime is 101100109993. The reversal of 101100109991 is 199901001101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101100109991 is a prime.

Together with 101100109993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101100109993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50550054995 + 50550054996.

It is an arithmetic number, because the mean of its divisors is an integer number (50550054996).

Almost surely, 2^101100109991 is an apocalyptic number.

101100109991 is a deficient number, since it is larger than the sum of its proper divisors (1).

101100109991 is an equidigital number, since it uses as much as digits as its factorization.

101100109991 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.

The spelling of 101100109991 in words is "one hundred one billion, one hundred million, one hundred nine thousand, nine hundred ninety-one".