11221232213 has 4 divisors (see below), whose sum is σ = 11223882348. Its totient is φ = 11218582080.

The previous prime is 11221232147. The next prime is 11221232257. The reversal of 11221232213 is 31223212211.

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 9064372849 + 2156859364 = 95207^2 + 46442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11221232213 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 (11221232273) 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, 1318706 + ... + 1327187.

It is an arithmetic number, because the mean of its divisors is an integer number (2805970587).

Almost surely, 2^11221232213 is an apocalyptic number.

It is an amenable number.

11221232213 is a deficient number, since it is larger than the sum of its proper divisors (2650135).

11221232213 is an equidigital number, since it uses as much as digits as its factorization.

11221232213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650134.

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

Adding to 11221232213 its reverse (31223212211), we get a palindrome (42444444424).

The spelling of 11221232213 in words is "eleven billion, two hundred twenty-one million, two hundred thirty-two thousand, two hundred thirteen".