91121112061 has 16 divisors (see below), whose sum is σ = 104512464000. Its totient is φ = 77823774720.

The previous prime is 91121112059. The next prime is 91121112067. The reversal of 91121112061 is 16021112119.

It is a cyclic number.

It is not a de Polignac number, because 91121112061 - 2¹ = 91121112059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91121112067) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2218665 + ... + 2259361.

It is an arithmetic number, because the mean of its divisors is an integer number (6532029000).

Almost surely, 2^91121112061 is an apocalyptic number.

It is an amenable number.

91121112061 is a deficient number, since it is larger than the sum of its proper divisors (13391351939).

91121112061 is a wasteful number, since it uses less digits than its factorization.

91121112061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41844.

The product of its (nonzero) digits is 216, while the sum is 25.

The spelling of 91121112061 in words is "ninety-one billion, one hundred twenty-one million, one hundred twelve thousand, sixty-one".