1990001100001 has 8 divisors (see below), whose sum is σ = 2054435861504. Its totient is φ = 1925581412160.

The previous prime is 1990001099971. The next prime is 1990001100013. The reversal of 1990001100001 is 1000011000991.

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 1990001100001 - 2¹³ = 1990001091809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1990001100071) 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, 3499800 + ... + 4028473.

It is an arithmetic number, because the mean of its divisors is an integer number (256804482688).

Almost surely, 2^{1990001100001} is an apocalyptic number.

It is an amenable number.

1990001100001 is a deficient number, since it is larger than the sum of its proper divisors (64434761503).

1990001100001 is an equidigital number, since it uses as much as digits as its factorization.

1990001100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7536831.

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

Adding to 1990001100001 its reverse (1000011000991), we get a palindrome (2990012100992).

The spelling of 1990001100001 in words is "one trillion, nine hundred ninety billion, one million, one hundred thousand, one".