1100100091 has 2 divisors, whose sum is σ = 1100100092. Its totient is φ = 1100100090.

The previous prime is 1100100083. The next prime is 1100100121. The reversal of 1100100091 is 1900010011.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1100100091 - 2³ = 1100100083 is a prime.

It is not a weakly prime, because it can be changed into another prime (1100100041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550050045 + 550050046.

It is an arithmetic number, because the mean of its divisors is an integer number (550050046).

Almost surely, 2^1100100091 is an apocalyptic number.

1100100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100100091 is an equidigital number, since it uses as much as digits as its factorization.

1100100091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9, while the sum is 13.

The square root of 1100100091 is about 33167.7567978300. The cubic root of 1100100091 is about 1032.3114241883.

The spelling of 1100100091 in words is "one billion, one hundred million, one hundred thousand, ninety-one".