11130312221 has 12 divisors (see below), whose sum is σ = 13140756288. Its totient is φ = 9397872792.

The previous prime is 11130312187. The next prime is 11130312241. The reversal of 11130312221 is 12221303111.

It is not a de Polignac number, because 11130312221 - 2¹⁰ = 11130311197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11130312221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11130312241) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1691861 + ... + 1698426.

It is an arithmetic number, because the mean of its divisors is an integer number (1095063024).

Almost surely, 2^11130312221 is an apocalyptic number.

It is an amenable number.

11130312221 is a deficient number, since it is larger than the sum of its proper divisors (2010444067).

11130312221 is an equidigital number, since it uses as much as digits as its factorization.

11130312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3390368 (or 3390361 counting only the distinct ones).

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

Adding to 11130312221 its reverse (12221303111), we get a palindrome (23351615332).

The spelling of 11130312221 in words is "eleven billion, one hundred thirty million, three hundred twelve thousand, two hundred twenty-one".