11113221001 has 8 divisors (see below), whose sum is σ = 11145573000. Its totient is φ = 11080903680.

The previous prime is 11113220999. The next prime is 11113221023. The reversal of 11113221001 is 10012231111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 3201296400 + 7911924601 = 56580^2 + 88949^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11113221001 - 2¹ = 11113220999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11113221601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720195 + ... + 735463.

It is an arithmetic number, because the mean of its divisors is an integer number (1393196625).

Almost surely, 2^11113221001 is an apocalyptic number.

It is an amenable number.

11113221001 is a deficient number, since it is larger than the sum of its proper divisors (32351999).

11113221001 is a wasteful number, since it uses less digits than its factorization.

11113221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17339.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 11113221001 its reverse (10012231111), we get a palindrome (21125452112).

The spelling of 11113221001 in words is "eleven billion, one hundred thirteen million, two hundred twenty-one thousand, one".