12131405535 has 16 divisors (see below), whose sum is σ = 19412729856. Its totient is φ = 6469255968.

The previous prime is 12131405509. The next prime is 12131405569. The reversal of 12131405535 is 53550413121.

It is not a de Polignac number, because 12131405535 - 2¹⁹ = 12130881247 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80482 + ... + 175328.

It is an arithmetic number, because the mean of its divisors is an integer number (1213295616).

Almost surely, 2^12131405535 is an apocalyptic number.

12131405535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12131405535 is a deficient number, since it is larger than the sum of its proper divisors (7281324321).

12131405535 is an equidigital number, since it uses as much as digits as its factorization.

12131405535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103382.

The product of its (nonzero) digits is 9000, while the sum is 30.

Adding to 12131405535 its reverse (53550413121), we get a palindrome (65681818656).

The spelling of 12131405535 in words is "twelve billion, one hundred thirty-one million, four hundred five thousand, five hundred thirty-five".