991012110112 has 24 divisors (see below), whose sum is σ = 1952064554076. Its totient is φ = 495249683712.

The previous prime is 991012110083. The next prime is 991012110133. The reversal of 991012110112 is 211011210199.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 906844816656 + 84167293456 = 952284^2 + 290116^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7948783 + ... + 8072494.

Almost surely, 2^991012110112 is an apocalyptic number.

It is an amenable number.

991012110112 is a deficient number, since it is larger than the sum of its proper divisors (961052443964).

991012110112 is a wasteful number, since it uses less digits than its factorization.

991012110112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16023220 (or 16023212 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 28.

The spelling of 991012110112 in words is "nine hundred ninety-one billion, twelve million, one hundred ten thousand, one hundred twelve".