12351111131 has 4 divisors (see below), whose sum is σ = 12365833200. Its totient is φ = 12336389064.

The previous prime is 12351111089. The next prime is 12351111163. The reversal of 12351111131 is 13111115321.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12351111131 - 2²⁶ = 12284002267 is a prime.

It is a super-2 number, since 2×12351111131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12351111431) 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, 7359776 + ... + 7361453.

It is an arithmetic number, because the mean of its divisors is an integer number (3091458300).

Almost surely, 2^12351111131 is an apocalyptic number.

12351111131 is a deficient number, since it is larger than the sum of its proper divisors (14722069).

12351111131 is an equidigital number, since it uses as much as digits as its factorization.

12351111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14722068.

The product of its digits is 90, while the sum is 20.

Adding to 12351111131 its reverse (13111115321), we get a palindrome (25462226452).

The spelling of 12351111131 in words is "twelve billion, three hundred fifty-one million, one hundred eleven thousand, one hundred thirty-one".