11113011221 has 16 divisors (see below), whose sum is σ = 12200146560. Its totient is φ = 10059266880.

The previous prime is 11113011193. The next prime is 11113011313. The reversal of 11113011221 is 12211031111.

It is not a de Polignac number, because 11113011221 - 2³⁰ = 10039269397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11113011196 and 11113011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11113013221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1920110 + ... + 1925888.

It is an arithmetic number, because the mean of its divisors is an integer number (762509160).

Almost surely, 2^11113011221 is an apocalyptic number.

It is an amenable number.

11113011221 is a deficient number, since it is larger than the sum of its proper divisors (1087135339).

11113011221 is a wasteful number, since it uses less digits than its factorization.

11113011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8636.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 11113011221 its reverse (12211031111), we get a palindrome (23324042332).

The spelling of 11113011221 in words is "eleven billion, one hundred thirteen million, eleven thousand, two hundred twenty-one".