12144433261 has 2 divisors, whose sum is σ = 12144433262. Its totient is φ = 12144433260.

The previous prime is 12144433229. The next prime is 12144433291. The reversal of 12144433261 is 16233444121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10527991236 + 1616442025 = 102606^2 + 40205^2 .

It is a cyclic number.

It is not a de Polignac number, because 12144433261 - 2⁵ = 12144433229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12144433201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6072216630 + 6072216631.

It is an arithmetic number, because the mean of its divisors is an integer number (6072216631).

Almost surely, 2^12144433261 is an apocalyptic number.

It is an amenable number.

12144433261 is a deficient number, since it is larger than the sum of its proper divisors (1).

12144433261 is an equidigital number, since it uses as much as digits as its factorization.

12144433261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

Adding to 12144433261 its reverse (16233444121), we get a palindrome (28377877382).

The spelling of 12144433261 in words is "twelve billion, one hundred forty-four million, four hundred thirty-three thousand, two hundred sixty-one".