11131260513 has 4 divisors (see below), whose sum is σ = 14841680688. Its totient is φ = 7420840340.

The previous prime is 11131260473. The next prime is 11131260571. The reversal of 11131260513 is 31506213111.

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.

It is a cyclic number.

It is not a de Polignac number, because 11131260513 - 2¹⁴ = 11131244129 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11131260583) 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, 1855210083 + ... + 1855210088.

It is an arithmetic number, because the mean of its divisors is an integer number (3710420172).

Almost surely, 2^11131260513 is an apocalyptic number.

It is an amenable number.

11131260513 is a deficient number, since it is larger than the sum of its proper divisors (3710420175).

11131260513 is an equidigital number, since it uses as much as digits as its factorization.

11131260513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710420174.

The product of its (nonzero) digits is 540, while the sum is 24.

Adding to 11131260513 its reverse (31506213111), we get a palindrome (42637473624).

The spelling of 11131260513 in words is "eleven billion, one hundred thirty-one million, two hundred sixty thousand, five hundred thirteen".