1011100091 has 2 divisors, whose sum is σ = 1011100092. Its totient is φ = 1011100090.

The previous prime is 1011100043. The next prime is 1011100117. The reversal of 1011100091 is 1900011101.

It is a happy number.

1011100091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (1900011101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011100091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011100291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505550045 + 505550046.

It is an arithmetic number, because the mean of its divisors is an integer number (505550046).

Almost surely, 2^1011100091 is an apocalyptic number.

1011100091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011100091 is an equidigital number, since it uses as much as digits as its factorization.

1011100091 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 14.

The square root of 1011100091 is about 31797.8000968620. The cubic root of 1011100091 is about 1003.6864239129.

Adding to 1011100091 its reverse (1900011101), we get a palindrome (2911111192).

The spelling of 1011100091 in words is "one billion, eleven million, one hundred thousand, ninety-one".