11523221115 has 32 divisors (see below), whose sum is σ = 21114393600. Its totient is φ = 5256918144.

The previous prime is 11523221089. The next prime is 11523221153. The reversal of 11523221115 is 51112232511.

It is not a de Polignac number, because 11523221115 - 2⁸ = 11523220859 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61540 + ... + 163809.

It is an arithmetic number, because the mean of its divisors is an integer number (659824800).

Almost surely, 2^11523221115 is an apocalyptic number.

11523221115 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

11523221115 is a deficient number, since it is larger than the sum of its proper divisors (9591172485).

11523221115 is a wasteful number, since it uses less digits than its factorization.

11523221115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225851.

The product of its digits is 600, while the sum is 24.

Adding to 11523221115 its reverse (51112232511), we get a palindrome (62635453626).

The spelling of 11523221115 in words is "eleven billion, five hundred twenty-three million, two hundred twenty-one thousand, one hundred fifteen".