91103621101 has 4 divisors (see below), whose sum is σ = 91115951452. Its totient is φ = 91091290752.

The previous prime is 91103621093. The next prime is 91103621131. The reversal of 91103621101 is 10112630119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 55523853225 + 35579767876 = 235635^2 + 188626^2 .

It is a cyclic number.

It is not a de Polignac number, because 91103621101 - 2³ = 91103621093 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 (91103621131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6154086 + ... + 6168871.

It is an arithmetic number, because the mean of its divisors is an integer number (22778987863).

Almost surely, 2^91103621101 is an apocalyptic number.

It is an amenable number.

91103621101 is a deficient number, since it is larger than the sum of its proper divisors (12330351).

91103621101 is a wasteful number, since it uses less digits than its factorization.

91103621101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12330350.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 91103621101 in words is "ninety-one billion, one hundred three million, six hundred twenty-one thousand, one hundred one".