999010100101001 has 4 divisors (see below), whose sum is σ = 1017859347272772. Its totient is φ = 980160852929232.

The previous prime is 999010100100989. The next prime is 999010100101033. The reversal of 999010100101001 is 100101001010999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 711794919865225 + 287215180235776 = 26679485^2 + 16947424^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999010100101001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999010100101061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9424623585806 + ... + 9424623585911.

It is an arithmetic number, because the mean of its divisors is an integer number (254464836818193).

Almost surely, 2^{999010100101001} is an apocalyptic number.

It is an amenable number.

999010100101001 is a deficient number, since it is larger than the sum of its proper divisors (18849247171771).

999010100101001 is a wasteful number, since it uses less digits than its factorization.

999010100101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18849247171770.

The product of its (nonzero) digits is 729, while the sum is 32.

The spelling of 999010100101001 in words is "nine hundred ninety-nine trillion, ten billion, one hundred million, one hundred one thousand, one".