12130434531 has 20 divisors (see below), whose sum is σ = 18908635152. Its totient is φ = 7735348368.

The previous prime is 12130434523. The next prime is 12130434539. The reversal of 12130434531 is 13543403121.

It is a happy number.

12130434531 is a `hidden beast` number, since 12 + 1 + 304 + 345 + 3 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (12130434523) and next prime (12130434539).

It is not a de Polignac number, because 12130434531 - 2³ = 12130434523 is a prime.

It is a super-2 number, since 2×12130434531² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 12130434495 and 12130434504.

It is not an unprimeable number, because it can be changed into a prime (12130434539) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 3253756 + ... + 3257481.

Almost surely, 2^12130434531 is an apocalyptic number.

12130434531 is a deficient number, since it is larger than the sum of its proper divisors (6778200621).

12130434531 is an equidigital number, since it uses as much as digits as its factorization.

12130434531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6511272 (or 6511263 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 12130434531 its reverse (13543403121), we get a palindrome (25673837652).

The spelling of 12130434531 in words is "twelve billion, one hundred thirty million, four hundred thirty-four thousand, five hundred thirty-one".