11232213221 has 4 divisors (see below), whose sum is σ = 11331613452. Its totient is φ = 11132812992.

The previous prime is 11232213211. The next prime is 11232213283. The reversal of 11232213221 is 12231223211.

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 6046773121 + 5185440100 = 77761^2 + 72010^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11232213221 is a prime.

It is a super-2 number, since 2×11232213221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11232213193 and 11232213202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11232213211) 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, 49699946 + ... + 49700171.

It is an arithmetic number, because the mean of its divisors is an integer number (2832903363).

Almost surely, 2^11232213221 is an apocalyptic number.

It is an amenable number.

11232213221 is a deficient number, since it is larger than the sum of its proper divisors (99400231).

11232213221 is an equidigital number, since it uses as much as digits as its factorization.

11232213221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99400230.

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

Adding to 11232213221 its reverse (12231223211), we get a palindrome (23463436432).

The spelling of 11232213221 in words is "eleven billion, two hundred thirty-two million, two hundred thirteen thousand, two hundred twenty-one".