12138471311 has 4 divisors (see below), whose sum is σ = 12138898152. Its totient is φ = 12138044472.

The previous prime is 12138471307. The next prime is 12138471431. The reversal of 12138471311 is 11317483121.

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 12138471311 - 2² = 12138471307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138441311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 167465 + ... + 228738.

It is an arithmetic number, because the mean of its divisors is an integer number (3034724538).

Almost surely, 2^12138471311 is an apocalyptic number.

12138471311 is a deficient number, since it is larger than the sum of its proper divisors (426841).

12138471311 is an equidigital number, since it uses as much as digits as its factorization.

12138471311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426840.

The product of its digits is 4032, while the sum is 32.

The spelling of 12138471311 in words is "twelve billion, one hundred thirty-eight million, four hundred seventy-one thousand, three hundred eleven".