11003112221 has 4 divisors (see below), whose sum is σ = 11006985312. Its totient is φ = 10999239132.

The previous prime is 11003112217. The next prime is 11003112251. The reversal of 11003112221 is 12221130011.

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 not a de Polignac number, because 11003112221 - 2² = 11003112217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11003112196 and 11003112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11003112251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1932281 + ... + 1937966.

It is an arithmetic number, because the mean of its divisors is an integer number (2751746328).

Almost surely, 2^11003112221 is an apocalyptic number.

It is an amenable number.

11003112221 is a deficient number, since it is larger than the sum of its proper divisors (3873091).

11003112221 is an equidigital number, since it uses as much as digits as its factorization.

11003112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873090.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 11003112221 its reverse (12221130011), we get a palindrome (23224242232).

The spelling of 11003112221 in words is "eleven billion, three million, one hundred twelve thousand, two hundred twenty-one".