91110019102 has 4 divisors (see below), whose sum is σ = 136665028656. Its totient is φ = 45555009550.

The previous prime is 91110019093. The next prime is 91110019123. The reversal of 91110019102 is 20191001119.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22777504774 + ... + 22777504777.

It is an arithmetic number, because the mean of its divisors is an integer number (34166257164).

Almost surely, 2^91110019102 is an apocalyptic number.

91110019102 is a deficient number, since it is larger than the sum of its proper divisors (45555009554).

91110019102 is a wasteful number, since it uses less digits than its factorization.

91110019102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45555009553.

The product of its (nonzero) digits is 162, while the sum is 25.

The spelling of 91110019102 in words is "ninety-one billion, one hundred ten million, nineteen thousand, one hundred two".