1001001100111 has 4 divisors (see below), whose sum is σ = 1001027019832. Its totient is φ = 1000975180392.

The previous prime is 1001001100087. The next prime is 1001001100123. The reversal of 1001001100111 is 1110011001001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1001001100111 - 2⁹ = 1001001099599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1001001100094 and 1001001100103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1001001100181) 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 3 ways as a sum of consecutive naturals, for example, 12901845 + ... + 12979198.

It is an arithmetic number, because the mean of its divisors is an integer number (250256754958).

Almost surely, 2^{1001001100111} is an apocalyptic number.

1001001100111 is a deficient number, since it is larger than the sum of its proper divisors (25919721).

1001001100111 is an equidigital number, since it uses as much as digits as its factorization.

1001001100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25919720.

The product of its (nonzero) digits is 1, while the sum is 7.

Adding to 1001001100111 its reverse (1110011001001), we get a palindrome (2111012101112).

The spelling of 1001001100111 in words is "one trillion, one billion, one million, one hundred thousand, one hundred eleven".