101001009999 has 16 divisors (see below), whose sum is σ = 138382852608. Its totient is φ = 65478565152.

The previous prime is 101001009997. The next prime is 101001010013. The reversal of 101001009999 is 999900100101.

It is not a de Polignac number, because 101001009999 - 2¹ = 101001009997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101001009997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41307 + ... + 451340.

It is an arithmetic number, because the mean of its divisors is an integer number (8648928288).

Almost surely, 2^101001009999 is an apocalyptic number.

101001009999 is a deficient number, since it is larger than the sum of its proper divisors (37381842609).

101001009999 is a wasteful number, since it uses less digits than its factorization.

101001009999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494534.

The product of its (nonzero) digits is 6561, while the sum is 39.

The spelling of 101001009999 in words is "one hundred one billion, one million, nine thousand, nine hundred ninety-nine".