100991010097 has 2 divisors, whose sum is σ = 100991010098. Its totient is φ = 100991010096.

The previous prime is 100991010059. The next prime is 100991010193. The reversal of 100991010097 is 790010199001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59205109041 + 41785901056 = 243321^2 + 204416^2 .

It is a cyclic number.

It is not a de Polignac number, because 100991010097 - 2¹¹ = 100991008049 is a prime.

It is not a weakly prime, because it can be changed into another prime (100991010397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50495505048 + 50495505049.

It is an arithmetic number, because the mean of its divisors is an integer number (50495505049).

Almost surely, 2^100991010097 is an apocalyptic number.

It is an amenable number.

100991010097 is a deficient number, since it is larger than the sum of its proper divisors (1).

100991010097 is an equidigital number, since it uses as much as digits as its factorization.

100991010097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5103, while the sum is 37.

The spelling of 100991010097 in words is "one hundred billion, nine hundred ninety-one million, ten thousand, ninety-seven".