12131211848 has 36 divisors (see below), whose sum is σ = 26464415715. Its totient is φ = 5198156208.

The previous prime is 12131211811. The next prime is 12131211853. The reversal of 12131211848 is 84811213121.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 6065605924 + 6065605924 = 77882^2 + 77882^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=77882.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2177915 + ... + 2183477.

Almost surely, 2^12131211848 is an apocalyptic number.

It is an amenable number.

12131211848 is an abundant number, since it is smaller than the sum of its proper divisors (14333203867).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12131211848 is an frugal number, since it uses more digits than its factorization.

12131211848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11146 (or 5572 counting only the distinct ones).

The product of its digits is 3072, while the sum is 32.

Multiplying 12131211848 by its sum of digits (32), we get a square (388198779136 = 623056²).

Adding to 12131211848 its reverse (84811213121), we get a palindrome (96942424969).

The spelling of 12131211848 in words is "twelve billion, one hundred thirty-one million, two hundred eleven thousand, eight hundred forty-eight".