21342044041 has 2 divisors, whose sum is σ = 21342044042. Its totient is φ = 21342044040.

The previous prime is 21342044039. The next prime is 21342044083. The reversal of 21342044041 is 14044024312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16996597641 + 4345446400 = 130371^2 + 65920^2 .

It is a cyclic number.

It is not a de Polignac number, because 21342044041 - 2¹ = 21342044039 is a prime.

Together with 21342044039, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 21342043997 and 21342044015.

It is not a weakly prime, because it can be changed into another prime (21342041041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10671022020 + 10671022021.

It is an arithmetic number, because the mean of its divisors is an integer number (10671022021).

Almost surely, 2^21342044041 is an apocalyptic number.

It is an amenable number.

21342044041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21342044041 is an equidigital number, since it uses as much as digits as its factorization.

21342044041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 21342044041 its reverse (14044024312), we get a palindrome (35386068353).

The spelling of 21342044041 in words is "twenty-one billion, three hundred forty-two million, forty-four thousand, forty-one".