12249868129 has 6 divisors (see below), whose sum is σ = 12589895094. Its totient is φ = 11918789280.

The previous prime is 12249868073. The next prime is 12249868133. The reversal of 12249868129 is 92186894221.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 9805554529 + 2444313600 = 99023^2 + 49440^2 .

It is not a de Polignac number, because 12249868129 - 2¹¹ = 12249866081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12249868139) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4472652 + ... + 4475389.

It is an arithmetic number, because the mean of its divisors is an integer number (2098315849).

Almost surely, 2^12249868129 is an apocalyptic number.

It is an amenable number.

12249868129 is a deficient number, since it is larger than the sum of its proper divisors (340026965).

12249868129 is an frugal number, since it uses more digits than its factorization.

12249868129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8948115 (or 8948078 counting only the distinct ones).

The product of its digits is 995328, while the sum is 52.

The spelling of 12249868129 in words is "twelve billion, two hundred forty-nine million, eight hundred sixty-eight thousand, one hundred twenty-nine".