12305531013511 has 4 divisors (see below), whose sum is σ = 12305538029800. Its totient is φ = 12305523997224.

The previous prime is 12305531013499. The next prime is 12305531013539. The reversal of 12305531013511 is 11531013550321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12305531013511 - 2⁷ = 12305531013383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12305534013511) 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, 1695145 + ... + 5242573.

It is an arithmetic number, because the mean of its divisors is an integer number (3076384507450).

Almost surely, 2^{12305531013511} is an apocalyptic number.

12305531013511 is a deficient number, since it is larger than the sum of its proper divisors (7016289).

12305531013511 is an equidigital number, since it uses as much as digits as its factorization.

12305531013511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7016288.

The product of its (nonzero) digits is 6750, while the sum is 31.

Adding to 12305531013511 its reverse (11531013550321), we get a palindrome (23836544563832).

The spelling of 12305531013511 in words is "twelve trillion, three hundred five billion, five hundred thirty-one million, thirteen thousand, five hundred eleven".