12131243444 has 6 divisors (see below), whose sum is σ = 21229676034. Its totient is φ = 6065621720.

The previous prime is 12131243419. The next prime is 12131243471. The reversal of 12131243444 is 44434213121.

It can be written as a sum of positive squares in only one way, i.e., 8470993444 + 3660250000 = 92038^2 + 60500^2 .

It is a super-2 number, since 2×12131243444² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1516405427 + ... + 1516405434.

It is an arithmetic number, because the mean of its divisors is an integer number (3538279339).

Almost surely, 2^12131243444 is an apocalyptic number.

It is an amenable number.

12131243444 is a deficient number, since it is larger than the sum of its proper divisors (9098432590).

12131243444 is a wasteful number, since it uses less digits than its factorization.

12131243444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3032810865 (or 3032810863 counting only the distinct ones).

The product of its digits is 9216, while the sum is 29.

Adding to 12131243444 its reverse (44434213121), we get a palindrome (56565456565).

The spelling of 12131243444 in words is "twelve billion, one hundred thirty-one million, two hundred forty-three thousand, four hundred forty-four".