991000112002 has 16 divisors (see below), whose sum is σ = 1518162744960. Its totient is φ = 484946348688.

The previous prime is 991000111979. The next prime is 991000112009. The reversal of 991000112002 is 200211000199.

It is not an unprimeable number, because it can be changed into a prime (991000112009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5244388 + ... + 5430064.

It is an arithmetic number, because the mean of its divisors is an integer number (94885171560).

Almost surely, 2^991000112002 is an apocalyptic number.

991000112002 is a deficient number, since it is larger than the sum of its proper divisors (527162632958).

991000112002 is a wasteful number, since it uses less digits than its factorization.

991000112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242505.

The product of its (nonzero) digits is 324, while the sum is 25.

The spelling of 991000112002 in words is "nine hundred ninety-one billion, one hundred twelve thousand, two".