2001001020999 has 8 divisors (see below), whose sum is σ = 2668131279600. Its totient is φ = 1333935721536.

The previous prime is 2001001020983. The next prime is 2001001021001. The reversal of 2001001020999 is 9990201001002.

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

It is not a de Polignac number, because 2001001020999 - 2⁴ = 2001001020983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001001020959) 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, 16167862 + ... + 16291155.

It is an arithmetic number, because the mean of its divisors is an integer number (333516409950).

Almost surely, 2^{2001001020999} is an apocalyptic number.

2001001020999 is a deficient number, since it is larger than the sum of its proper divisors (667130258601).

2001001020999 is a wasteful number, since it uses less digits than its factorization.

2001001020999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32479569.

The product of its (nonzero) digits is 2916, while the sum is 33.

The spelling of 2001001020999 in words is "two trillion, one billion, one million, twenty thousand, nine hundred ninety-nine".