91121333121011 has 16 divisors (see below), whose sum is σ = 97408581899904. Its totient is φ = 84938247174144.

The previous prime is 91121333120989. The next prime is 91121333121103. The reversal of 91121333121011 is 11012133312119.

It is not a de Polignac number, because 91121333121011 - 2³⁴ = 91104153251827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91121333121811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15323600 + ... + 20421933.

It is an arithmetic number, because the mean of its divisors is an integer number (6088036368744).

Almost surely, 2^{91121333121011} is an apocalyptic number.

91121333121011 is a deficient number, since it is larger than the sum of its proper divisors (6287248778893).

91121333121011 is a wasteful number, since it uses less digits than its factorization.

91121333121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35746990.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 91121333121011 in words is "ninety-one trillion, one hundred twenty-one billion, three hundred thirty-three million, one hundred twenty-one thousand, eleven".