11515134211 has 12 divisors (see below), whose sum is σ = 13413324360. Its totient is φ = 9856728000.

The previous prime is 11515134187. The next prime is 11515134227. The reversal of 11515134211 is 11243151511.

It is not a de Polignac number, because 11515134211 - 2⁹ = 11515133699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11515134311) 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, 122790 + ... + 195211.

It is an arithmetic number, because the mean of its divisors is an integer number (1117777030).

Almost surely, 2^11515134211 is an apocalyptic number.

11515134211 is a deficient number, since it is larger than the sum of its proper divisors (1898190149).

11515134211 is an equidigital number, since it uses as much as digits as its factorization.

11515134211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318754 (or 318747 counting only the distinct ones).

The product of its digits is 600, while the sum is 25.

Adding to 11515134211 its reverse (11243151511), we get a palindrome (22758285722).

The spelling of 11515134211 in words is "eleven billion, five hundred fifteen million, one hundred thirty-four thousand, two hundred eleven".