12131415305551 has 4 divisors (see below), whose sum is σ = 12131423031312. Its totient is φ = 12131407579792.

The previous prime is 12131415305519. The next prime is 12131415305563. The reversal of 12131415305551 is 15550351413121.

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 12131415305551 - 2⁵ = 12131415305519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12131415305551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131415305591) 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, 574246 + ... + 4959091.

It is an arithmetic number, because the mean of its divisors is an integer number (3032855757828).

Almost surely, 2^{12131415305551} is an apocalyptic number.

12131415305551 is a deficient number, since it is larger than the sum of its proper divisors (7725761).

12131415305551 is an equidigital number, since it uses as much as digits as its factorization.

12131415305551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7725760.

The product of its (nonzero) digits is 45000, while the sum is 37.

Adding to 12131415305551 its reverse (15550351413121), we get a palindrome (27681766718672).

The spelling of 12131415305551 in words is "twelve trillion, one hundred thirty-one billion, four hundred fifteen million, three hundred five thousand, five hundred fifty-one".