It is a nialpdrome in base 10.
Almost surely, 2999999970000000 is an apocalyptic number.
999999970000000 is the 20000000-th heptagonal number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 999999970000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1246090119571440).
999999970000000 is an abundant number, since it is smaller than the sum of its proper divisors (1492180269142880).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
999999970000000 is an frugal number, since it uses more digits than its factorization.
999999970000000 is an odious number, because the sum of its binary digits is odd.
The spelling of 999999970000000 in words is "nine hundred ninety-nine trillion, nine hundred ninety-nine billion, nine hundred seventy million", and thus it is an aban number.