91910101012 has 24 divisors (see below), whose sum is σ = 166614285600. Its totient is φ = 44310311136.

The previous prime is 91910101009. The next prime is 91910101081. The reversal of 91910101012 is 21010101919.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450358 + ... + 621805.

It is an arithmetic number, because the mean of its divisors is an integer number (6942261900).

Almost surely, 2^91910101012 is an apocalyptic number.

It is an amenable number.

91910101012 is a deficient number, since it is larger than the sum of its proper divisors (74704184588).

91910101012 is a wasteful number, since it uses less digits than its factorization.

91910101012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072935 (or 1072933 counting only the distinct ones).

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

The spelling of 91910101012 in words is "ninety-one billion, nine hundred ten million, one hundred one thousand, twelve".