12131785227 has 4 divisors (see below), whose sum is σ = 16175713640. Its totient is φ = 8087856816.

The previous prime is 12131785201. The next prime is 12131785273. The reversal of 12131785227 is 72258713121.

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

It is not a de Polignac number, because 12131785227 - 2¹⁴ = 12131768843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12131785927) 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, 2021964202 + ... + 2021964207.

It is an arithmetic number, because the mean of its divisors is an integer number (4043928410).

Almost surely, 2^12131785227 is an apocalyptic number.

12131785227 is a deficient number, since it is larger than the sum of its proper divisors (4043928413).

12131785227 is an equidigital number, since it uses as much as digits as its factorization.

12131785227 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4043928412.

The product of its digits is 47040, while the sum is 39.

The spelling of 12131785227 in words is "twelve billion, one hundred thirty-one million, seven hundred eighty-five thousand, two hundred twenty-seven".