91121112067 has 2 divisors, whose sum is σ = 91121112068. Its totient is φ = 91121112066.

The previous prime is 91121112059. The next prime is 91121112101. The reversal of 91121112067 is 76021112119.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91121112067 - 2³ = 91121112059 is a prime.

It is not a weakly prime, because it can be changed into another prime (91121112167) 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 as a sum of consecutive naturals, namely, 45560556033 + 45560556034.

It is an arithmetic number, because the mean of its divisors is an integer number (45560556034).

Almost surely, 2^91121112067 is an apocalyptic number.

91121112067 is a deficient number, since it is larger than the sum of its proper divisors (1).

91121112067 is an equidigital number, since it uses as much as digits as its factorization.

91121112067 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 31.

The spelling of 91121112067 in words is "ninety-one billion, one hundred twenty-one million, one hundred twelve thousand, sixty-seven".