11010101001001 has 4 divisors (see below), whose sum is σ = 11011120560000. Its totient is φ = 11009081442004.

The previous prime is 11010101000971. The next prime is 11010101001049. The reversal of 11010101001001 is 10010010101011.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11010101001001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11010101001301) 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, 509763301 + ... + 509784898.

It is an arithmetic number, because the mean of its divisors is an integer number (2752780140000).

Almost surely, 2^{11010101001001} is an apocalyptic number.

It is an amenable number.

11010101001001 is a deficient number, since it is larger than the sum of its proper divisors (1019558999).

11010101001001 is a wasteful number, since it uses less digits than its factorization.

11010101001001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019558998.

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

Adding to 11010101001001 its reverse (10010010101011), we get a palindrome (21020111102012).

The spelling of 11010101001001 in words is "eleven trillion, ten billion, one hundred one million, one thousand, one".