11112041221 has 6 divisors (see below), whose sum is σ = 11616179750. Its totient is φ = 10628908488.

The previous prime is 11112041219. The next prime is 11112041249. The reversal of 11112041221 is 12214021111.

It can be written as a sum of positive squares in only one way, i.e., 11106208996 + 5832225 = 105386^2 + 2415^2 .

It is not a de Polignac number, because 11112041221 - 2¹ = 11112041219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112041195 and 11112041204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112041261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10502346 + ... + 10503403.

Almost surely, 2^11112041221 is an apocalyptic number.

It is an amenable number.

11112041221 is a deficient number, since it is larger than the sum of its proper divisors (504138529).

11112041221 is an equidigital number, since it uses as much as digits as its factorization.

11112041221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21005795 (or 21005772 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 11112041221 its reverse (12214021111), we get a palindrome (23326062332).

The spelling of 11112041221 in words is "eleven billion, one hundred twelve million, forty-one thousand, two hundred twenty-one".