91000100911 has 4 divisors (see below), whose sum is σ = 91046225592. Its totient is φ = 90953976232.

The previous prime is 91000100903. The next prime is 91000100951. The reversal of 91000100911 is 11900100019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11900100019 = 23 ⋅517395653.

It is a cyclic number.

It is not a de Polignac number, because 91000100911 - 2³ = 91000100903 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 (91000100951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23059381 + ... + 23063326.

It is an arithmetic number, because the mean of its divisors is an integer number (22761556398).

Almost surely, 2^91000100911 is an apocalyptic number.

91000100911 is a deficient number, since it is larger than the sum of its proper divisors (46124681).

91000100911 is a wasteful number, since it uses less digits than its factorization.

91000100911 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46124680.

The product of its (nonzero) digits is 81, while the sum is 22.

The spelling of 91000100911 in words is "ninety-one billion, one hundred thousand, nine hundred eleven".