1001100100985 has 4 divisors (see below), whose sum is σ = 1201320121188. Its totient is φ = 800880080784.

The previous prime is 1001100100951. The next prime is 1001100100991. The reversal of 1001100100985 is 5890010011001.

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 408920601961 + 592179499024 = 639469^2 + 769532^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001100100985 - 2³² = 996805133689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100110010094 + ... + 100110010103.

It is an arithmetic number, because the mean of its divisors is an integer number (300330030297).

Almost surely, 2^{1001100100985} is an apocalyptic number.

It is an amenable number.

1001100100985 is a deficient number, since it is larger than the sum of its proper divisors (200220020203).

1001100100985 is an equidigital number, since it uses as much as digits as its factorization.

1001100100985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200220020202.

The product of its (nonzero) digits is 360, while the sum is 26.

Adding to 1001100100985 its reverse (5890010011001), we get a palindrome (6891110111986).

The spelling of 1001100100985 in words is "one trillion, one billion, one hundred million, one hundred thousand, nine hundred eighty-five".