11120331221 has 4 divisors (see below), whose sum is σ = 11120542272. Its totient is φ = 11120120172.

The previous prime is 11120331217. The next prime is 11120331223. The reversal of 11120331221 is 12213302111.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11120331221 - 2² = 11120331217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 11120331221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11120331223) 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, 46916 + ... + 156338.

It is an arithmetic number, because the mean of its divisors is an integer number (2780135568).

Almost surely, 2^11120331221 is an apocalyptic number.

It is an amenable number.

11120331221 is a deficient number, since it is larger than the sum of its proper divisors (211051).

11120331221 is a wasteful number, since it uses less digits than its factorization.

11120331221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211050.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 11120331221 its reverse (12213302111), we get a palindrome (23333633332).

The spelling of 11120331221 in words is "eleven billion, one hundred twenty million, three hundred thirty-one thousand, two hundred twenty-one".