11011101001 has 4 divisors (see below), whose sum is σ = 11011355332. Its totient is φ = 11010846672.

The previous prime is 11011100981. The next prime is 11011101011. The reversal of 11011101001 is 10010111011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10010111011 = 283 ⋅35371417.

It can be written as a sum of positive squares in 2 ways, for example, as 7597737225 + 3413363776 = 87165^2 + 58424^2 .

It is a cyclic number.

It is not a de Polignac number, because 11011101001 - 2¹³ = 11011092809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11011101011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44166 + ... + 154831.

It is an arithmetic number, because the mean of its divisors is an integer number (2752838833).

Almost surely, 2^11011101001 is an apocalyptic number.

It is an amenable number.

11011101001 is a deficient number, since it is larger than the sum of its proper divisors (254331).

11011101001 is an equidigital number, since it uses as much as digits as its factorization.

11011101001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254330.

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

Adding to 11011101001 its reverse (10010111011), we get a palindrome (21021212012).

The spelling of 11011101001 in words is "eleven billion, eleven million, one hundred one thousand, one".