1000991199012 has 48 divisors (see below), whose sum is σ = 2826328095360. Its totient is φ = 269174103552.

The previous prime is 1000991199011. The next prime is 1000991199059. The reversal of 1000991199012 is 2109911990001.

It is a super-2 number, since 2×1000991199012² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1000991199011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350485687 + ... + 350488542.

It is an arithmetic number, because the mean of its divisors is an integer number (58881835320).

Almost surely, 2^{1000991199012} is an apocalyptic number.

1000991199012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1000991199012 is an abundant number, since it is smaller than the sum of its proper divisors (1825336896348).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1000991199012 is a wasteful number, since it uses less digits than its factorization.

1000991199012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700974260 (or 700974258 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 42.

The spelling of 1000991199012 in words is "one trillion, nine hundred ninety-one million, one hundred ninety-nine thousand, twelve".