91001021110111 has 16 divisors (see below), whose sum is σ = 107265581153280. Its totient is φ = 75585427840800.

The previous prime is 91001021110081. The next prime is 91001021110159. The reversal of 91001021110111 is 11101112010019.

It is a cyclic number.

It is not a de Polignac number, because 91001021110111 - 2¹³ = 91001021101919 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91001021119111) 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, 1369268001 + ... + 1369334458.

It is an arithmetic number, because the mean of its divisors is an integer number (6704098822080).

Almost surely, 2^{91001021110111} is an apocalyptic number.

91001021110111 is a deficient number, since it is larger than the sum of its proper divisors (16264560043169).

91001021110111 is a wasteful number, since it uses less digits than its factorization.

91001021110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738602614.

The product of its (nonzero) digits is 18, while the sum is 19.

The spelling of 91001021110111 in words is "ninety-one trillion, one billion, twenty-one million, one hundred ten thousand, one hundred eleven".