11143221115 has 32 divisors (see below), whose sum is σ = 15535328256. Its totient is φ = 7598622720.

The previous prime is 11143221113. The next prime is 11143221161. The reversal of 11143221115 is 51112234111.

It is not a de Polignac number, because 11143221115 - 2¹ = 11143221113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11143221113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36571 + ... + 153700.

It is an arithmetic number, because the mean of its divisors is an integer number (485479008).

Almost surely, 2^11143221115 is an apocalyptic number.

11143221115 is a deficient number, since it is larger than the sum of its proper divisors (4392107141).

11143221115 is a wasteful number, since it uses less digits than its factorization.

11143221115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190359.

The product of its digits is 240, while the sum is 22.

Adding to 11143221115 its reverse (51112234111), we get a palindrome (62255455226).

The spelling of 11143221115 in words is "eleven billion, one hundred forty-three million, two hundred twenty-one thousand, one hundred fifteen".