91120027105 has 4 divisors (see below), whose sum is σ = 109344032532. Its totient is φ = 72896021680.

The previous prime is 91120027093. The next prime is 91120027109. The reversal of 91120027105 is 50172002119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20687644224 + 70432382881 = 143832^2 + 265391^2 .

It is not a de Polignac number, because 91120027105 - 2¹⁵ = 91119994337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91120027109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9112002706 + ... + 9112002715.

It is an arithmetic number, because the mean of its divisors is an integer number (27336008133).

Almost surely, 2^91120027105 is an apocalyptic number.

It is an amenable number.

91120027105 is a deficient number, since it is larger than the sum of its proper divisors (18224005427).

91120027105 is a wasteful number, since it uses less digits than its factorization.

91120027105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18224005426.

The product of its (nonzero) digits is 1260, while the sum is 28.

The spelling of 91120027105 in words is "ninety-one billion, one hundred twenty million, twenty-seven thousand, one hundred five".