11203232221 has 4 divisors (see below), whose sum is σ = 11441598912. Its totient is φ = 10964865532.

The previous prime is 11203232113. The next prime is 11203232231. The reversal of 11203232221 is 12223230211.

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 11203232221 - 2⁹ = 11203231709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11203232231) 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, 119183275 + ... + 119183368.

It is an arithmetic number, because the mean of its divisors is an integer number (2860399728).

Almost surely, 2^11203232221 is an apocalyptic number.

It is an amenable number.

11203232221 is a deficient number, since it is larger than the sum of its proper divisors (238366691).

11203232221 is an equidigital number, since it uses as much as digits as its factorization.

11203232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238366690.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 11203232221 its reverse (12223230211), we get a palindrome (23426462432).

The spelling of 11203232221 in words is "eleven billion, two hundred three million, two hundred thirty-two thousand, two hundred twenty-one".