91010101011011 has 32 divisors (see below), whose sum is σ = 118196107276800. Its totient is φ = 68051304748800.

The previous prime is 91010101010999. The next prime is 91010101011031. The reversal of 91010101011011 is 11011010101019.

91010101011011 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 91010101011011 - 2⁶ = 91010101010947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91010101011031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 63641765 + ... + 65056086.

It is an arithmetic number, because the mean of its divisors is an integer number (3693628352400).

Almost surely, 2^{91010101011011} is an apocalyptic number.

91010101011011 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

91010101011011 is a deficient number, since it is larger than the sum of its proper divisors (27186006265789).

91010101011011 is a wasteful number, since it uses less digits than its factorization.

91010101011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128698299.

The product of its (nonzero) digits is 9, while the sum is 17.

The spelling of 91010101011011 in words is "ninety-one trillion, ten billion, one hundred one million, eleven thousand, eleven".