991100031332 has 12 divisors (see below), whose sum is σ = 1735156587696. Its totient is φ = 495341006280.

The previous prime is 991100031319. The next prime is 991100031443. The reversal of 991100031332 is 233130001199.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52241678 + ... + 52260645.

It is an arithmetic number, because the mean of its divisors is an integer number (144596382308).

Almost surely, 2^991100031332 is an apocalyptic number.

It is an amenable number.

991100031332 is a deficient number, since it is larger than the sum of its proper divisors (744056556364).

991100031332 is a wasteful number, since it uses less digits than its factorization.

991100031332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104504698 (or 104504696 counting only the distinct ones).

The product of its (nonzero) digits is 4374, while the sum is 32.

The spelling of 991100031332 in words is "nine hundred ninety-one billion, one hundred million, thirty-one thousand, three hundred thirty-two".