1020201009999 has 16 divisors (see below), whose sum is σ = 1373784568320. Its totient is φ = 673376205600.

The previous prime is 1020201009917. The next prime is 1020201010007. The reversal of 1020201009999 is 9999001020201.

It is not a de Polignac number, because 1020201009999 - 2⁷ = 1020201009871 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1020201009999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020201009199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14000742 + ... + 14073420.

It is an arithmetic number, because the mean of its divisors is an integer number (85861535520).

Almost surely, 2^{1020201009999} is an apocalyptic number.

1020201009999 is a deficient number, since it is larger than the sum of its proper divisors (353583558321).

1020201009999 is a wasteful number, since it uses less digits than its factorization.

1020201009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119110.

The product of its (nonzero) digits is 26244, while the sum is 42.

The spelling of 1020201009999 in words is "one trillion, twenty billion, two hundred one million, nine thousand, nine hundred ninety-nine".