91100110001 has 2 divisors, whose sum is σ = 91100110002. Its totient is φ = 91100110000.

The previous prime is 91100109977. The next prime is 91100110009. The reversal of 91100110001 is 10001100119.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88455682225 + 2644427776 = 297415^2 + 51424^2 .

It is a cyclic number.

It is not a de Polignac number, because 91100110001 - 2⁶ = 91100109937 is a prime.

It is not a weakly prime, because it can be changed into another prime (91100110009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45550055000 + 45550055001.

It is an arithmetic number, because the mean of its divisors is an integer number (45550055001).

Almost surely, 2^91100110001 is an apocalyptic number.

It is an amenable number.

91100110001 is a deficient number, since it is larger than the sum of its proper divisors (1).

91100110001 is an equidigital number, since it uses as much as digits as its factorization.

91100110001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9, while the sum is 14.

The spelling of 91100110001 in words is "ninety-one billion, one hundred million, one hundred ten thousand, one".