12131128487 has 8 divisors (see below), whose sum is σ = 12699019104. Its totient is φ = 11566608768.

The previous prime is 12131128423. The next prime is 12131128571. The reversal of 12131128487 is 78482113121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12131128487 - 2⁶ = 12131128423 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 12131128487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12139128487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 835358 + ... + 849755.

It is an arithmetic number, because the mean of its divisors is an integer number (1587377388).

Almost surely, 2^12131128487 is an apocalyptic number.

12131128487 is a deficient number, since it is larger than the sum of its proper divisors (567890617).

12131128487 is a wasteful number, since it uses less digits than its factorization.

12131128487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685449.

The product of its digits is 21504, while the sum is 38.

The spelling of 12131128487 in words is "twelve billion, one hundred thirty-one million, one hundred twenty-eight thousand, four hundred eighty-seven".