12444433121 has 2 divisors, whose sum is σ = 12444433122. Its totient is φ = 12444433120.

The previous prime is 12444433031. The next prime is 12444433129. The reversal of 12444433121 is 12133444421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11085773521 + 1358659600 = 105289^2 + 36860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12444433121 is a prime.

It is not a weakly prime, because it can be changed into another prime (12444433129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6222216560 + 6222216561.

It is an arithmetic number, because the mean of its divisors is an integer number (6222216561).

Almost surely, 2^12444433121 is an apocalyptic number.

It is an amenable number.

12444433121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12444433121 is an equidigital number, since it uses as much as digits as its factorization.

12444433121 is an evil number, because the sum of its binary digits is even.

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

Adding to 12444433121 its reverse (12133444421), we get a palindrome (24577877542).

The spelling of 12444433121 in words is "twelve billion, four hundred forty-four million, four hundred thirty-three thousand, one hundred twenty-one".