12144341621 has 2 divisors, whose sum is σ = 12144341622. Its totient is φ = 12144341620.

The previous prime is 12144341617. The next prime is 12144341623. The reversal of 12144341621 is 12614344121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11652123025 + 492218596 = 107945^2 + 22186^2 .

It is a cyclic number.

It is not a de Polignac number, because 12144341621 - 2² = 12144341617 is a prime.

Together with 12144341623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12144341623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6072170810 + 6072170811.

It is an arithmetic number, because the mean of its divisors is an integer number (6072170811).

Almost surely, 2^12144341621 is an apocalyptic number.

It is an amenable number.

12144341621 is a deficient number, since it is larger than the sum of its proper divisors (1).

12144341621 is an equidigital number, since it uses as much as digits as its factorization.

12144341621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

Adding to 12144341621 its reverse (12614344121), we get a palindrome (24758685742).

The spelling of 12144341621 in words is "twelve billion, one hundred forty-four million, three hundred forty-one thousand, six hundred twenty-one".