11021011001 has 32 divisors (see below), whose sum is σ = 14835249408. Its totient is φ = 7906947840.

The previous prime is 11021010991. The next prime is 11021011007. The reversal of 11021011001 is 10011012011.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-11021011001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11021011001.

It is not an unprimeable number, because it can be changed into a prime (11021011007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 383531 + ... + 411263.

It is an arithmetic number, because the mean of its divisors is an integer number (463601544).

Almost surely, 2^11021011001 is an apocalyptic number.

11021011001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11021011001 is a deficient number, since it is larger than the sum of its proper divisors (3814238407).

11021011001 is a wasteful number, since it uses less digits than its factorization.

11021011001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28161.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11021011001 its reverse (10011012011), we get a palindrome (21032023012).

The spelling of 11021011001 in words is "eleven billion, twenty-one million, eleven thousand, one".