1000009901000 has 64 divisors (see below), whose sum is σ = 2552752575360. Its totient is φ = 363639960000.

The previous prime is 1000009900973. The next prime is 1000009901057. The reversal of 1000009901000 is 1099000001.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45443996 + ... + 45465995.

It is an arithmetic number, because the mean of its divisors is an integer number (39886758990).

Almost surely, 2^{1000009901000} is an apocalyptic number.

1000009901000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1000009901000 is an abundant number, since it is smaller than the sum of its proper divisors (1552742674360).

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

1000009901000 is a wasteful number, since it uses less digits than its factorization.

1000009901000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90910023 (or 90910009 counting only the distinct ones).

The product of its (nonzero) digits is 81, while the sum is 20.

The spelling of 1000009901000 in words is "one trillion, nine million, nine hundred one thousand".