1001001990001 has 8 divisors (see below), whose sum is σ = 1078010119424. Its totient is φ = 923995000080.

The previous prime is 1001001989899. The next prime is 1001001990013. The reversal of 1001001990001 is 1000991001001.

1001001990001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1001001990001 - 2¹⁵ = 1001001957233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001001990091) 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, 2691166 + ... + 3040456.

It is an arithmetic number, because the mean of its divisors is an integer number (134751264928).

Almost surely, 2^{1001001990001} is an apocalyptic number.

It is an amenable number.

1001001990001 is a deficient number, since it is larger than the sum of its proper divisors (77008129423).

1001001990001 is a wasteful number, since it uses less digits than its factorization.

1001001990001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569751.

The product of its (nonzero) digits is 81, while the sum is 22.

Adding to 1001001990001 its reverse (1000991001001), we get a palindrome (2001992991002).

The spelling of 1001001990001 in words is "one trillion, one billion, one million, nine hundred ninety thousand, one".