11003132221 has 4 divisors (see below), whose sum is σ = 11003423452. Its totient is φ = 11002840992.

The previous prime is 11003132213. The next prime is 11003132227. The reversal of 11003132221 is 12223130011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 975312900 + 10027819321 = 31230^2 + 100139^2 .

It is a cyclic number.

It is not a de Polignac number, because 11003132221 - 2³ = 11003132213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11003132195 and 11003132204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11003132227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78690 + ... + 167923.

It is an arithmetic number, because the mean of its divisors is an integer number (2750855863).

Almost surely, 2^11003132221 is an apocalyptic number.

It is an amenable number.

11003132221 is a deficient number, since it is larger than the sum of its proper divisors (291231).

11003132221 is an equidigital number, since it uses as much as digits as its factorization.

11003132221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291230.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 11003132221 its reverse (12223130011), we get a palindrome (23226262232).

The spelling of 11003132221 in words is "eleven billion, three million, one hundred thirty-two thousand, two hundred twenty-one".