990002003002001 has 12 divisors (see below), whose sum is σ = 1090189995170640. Its totient is φ = 891590588826360.

The previous prime is 990002003001989. The next prime is 990002003002021. The reversal of 990002003002001 is 100200300200099.

It is not a de Polignac number, because 990002003002001 - 2²⁶ = 990001935893137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (990002003002021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3930356291 + ... + 3930608168.

It is an arithmetic number, because the mean of its divisors is an integer number (90849166264220).

Almost surely, 2^{990002003002001} is an apocalyptic number.

It is an amenable number.

990002003002001 is a deficient number, since it is larger than the sum of its proper divisors (100187992168639).

990002003002001 is a wasteful number, since it uses less digits than its factorization.

990002003002001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7860964684 (or 7860964577 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 990002003002001 in words is "nine hundred ninety trillion, two billion, three million, two thousand, one".