11103432221 has 4 divisors (see below), whose sum is σ = 12689636832. Its totient is φ = 9517227612.

The previous prime is 11103432209. The next prime is 11103432247. The reversal of 11103432221 is 12223430111.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12223430111 = 463 ⋅26400497.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11103432221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11103432193 and 11103432202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11103432271) 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, 793102295 + ... + 793102308.

It is an arithmetic number, because the mean of its divisors is an integer number (3172409208).

Almost surely, 2^11103432221 is an apocalyptic number.

It is an amenable number.

11103432221 is a deficient number, since it is larger than the sum of its proper divisors (1586204611).

11103432221 is an equidigital number, since it uses as much as digits as its factorization.

11103432221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586204610.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 11103432221 its reverse (12223430111), we get a palindrome (23326862332).

The spelling of 11103432221 in words is "eleven billion, one hundred three million, four hundred thirty-two thousand, two hundred twenty-one".