91939121103 has 4 divisors (see below), whose sum is σ = 122585494808. Its totient is φ = 61292747400.

The previous prime is 91939121059. The next prime is 91939121119. The reversal of 91939121103 is 30112193919.

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

It is not a de Polignac number, because 91939121103 - 2⁹ = 91939120591 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 (91939121143) 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, 15323186848 + ... + 15323186853.

It is an arithmetic number, because the mean of its divisors is an integer number (30646373702).

Almost surely, 2^91939121103 is an apocalyptic number.

91939121103 is a deficient number, since it is larger than the sum of its proper divisors (30646373705).

91939121103 is a wasteful number, since it uses less digits than its factorization.

91939121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30646373704.

The product of its (nonzero) digits is 13122, while the sum is 39.

The spelling of 91939121103 in words is "ninety-one billion, nine hundred thirty-nine million, one hundred twenty-one thousand, one hundred three".