91211911103 has 8 divisors (see below), whose sum is σ = 94198235136. Its totient is φ = 88228337400.

The previous prime is 91211911093. The next prime is 91211911111. The reversal of 91211911103 is 30111911219.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91211911103 - 2⁶ = 91211911039 is a prime.

It is a super-2 number, since 2×91211911103² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91211911123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 620063 + ... + 752928.

It is an arithmetic number, because the mean of its divisors is an integer number (11774779392).

Almost surely, 2^91211911103 is an apocalyptic number.

91211911103 is a deficient number, since it is larger than the sum of its proper divisors (2986324033).

91211911103 is a wasteful number, since it uses less digits than its factorization.

91211911103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1375165.

The product of its (nonzero) digits is 486, while the sum is 29.

The spelling of 91211911103 in words is "ninety-one billion, two hundred eleven million, nine hundred eleven thousand, one hundred three".