91000000001012 has 12 divisors (see below), whose sum is σ = 159256874165760. Its totient is φ = 45498035953656.

The previous prime is 91000000001011. The next prime is 91000000001017. The reversal of 91000000001012 is 21010000000019.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91000000001011) 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, 490907462 + ... + 491092797.

It is an arithmetic number, because the mean of its divisors is an integer number (13271406180480).

Almost surely, 2^{91000000001012} is an apocalyptic number.

It is an amenable number.

91000000001012 is a deficient number, since it is larger than the sum of its proper divisors (68256874164748).

91000000001012 is a wasteful number, since it uses less digits than its factorization.

91000000001012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982023430 (or 982023428 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 14.

The spelling of 91000000001012 in words is "ninety-one trillion, one thousand, twelve".