11222232221 has 24 divisors (see below), whose sum is σ = 11933921664. Its totient is φ = 10546200000.

The previous prime is 11222232179. The next prime is 11222232227. The reversal of 11222232221 is 12223222211.

It is a de Polignac number, because none of the positive numbers 2^k-11222232221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11222232193 and 11222232202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11222232227) 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 23 ways as a sum of consecutive naturals, for example, 10677146 + ... + 10678196.

It is an arithmetic number, because the mean of its divisors is an integer number (497246736).

Almost surely, 2^11222232221 is an apocalyptic number.

It is an amenable number.

11222232221 is a deficient number, since it is larger than the sum of its proper divisors (711689443).

11222232221 is a wasteful number, since it uses less digits than its factorization.

11222232221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1425 (or 1394 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

Adding to 11222232221 its reverse (12223222211), we get a palindrome (23445454432).

The spelling of 11222232221 in words is "eleven billion, two hundred twenty-two million, two hundred thirty-two thousand, two hundred twenty-one".