1011100101001 has 4 divisors (see below), whose sum is σ = 1012063972500. Its totient is φ = 1010136229504.

The previous prime is 1011100100987. The next prime is 1011100101007. The reversal of 1011100101001 is 1001010011101.

It is a happy number.

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 482496944400 + 528603156601 = 694620^2 + 727051^2 .

It is a cyclic number.

It is not a de Polignac number, because 1011100101001 - 2¹⁵ = 1011100068233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011100101007) 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 3 ways as a sum of consecutive naturals, for example, 481934176 + ... + 481936273.

It is an arithmetic number, because the mean of its divisors is an integer number (253015993125).

Almost surely, 2^{1011100101001} is an apocalyptic number.

It is an amenable number.

1011100101001 is a deficient number, since it is larger than the sum of its proper divisors (963871499).

1011100101001 is an equidigital number, since it uses as much as digits as its factorization.

1011100101001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963871498.

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

Adding to 1011100101001 its reverse (1001010011101), we get a palindrome (2012110112102).

The spelling of 1011100101001 in words is "one trillion, eleven billion, one hundred million, one hundred one thousand, one".