21013440033241 has 2 divisors, whose sum is σ = 21013440033242. Its totient is φ = 21013440033240.

The previous prime is 21013440033211. The next prime is 21013440033323. The reversal of 21013440033241 is 14233004431012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21003623186841 + 9816846400 = 4582971^2 + 99080^2 .

It is a cyclic number.

It is not a de Polignac number, because 21013440033241 - 2⁹ = 21013440032729 is a prime.

It is not a weakly prime, because it can be changed into another prime (21013440033211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10506720016620 + 10506720016621.

It is an arithmetic number, because the mean of its divisors is an integer number (10506720016621).

Almost surely, 2^{21013440033241} is an apocalyptic number.

It is an amenable number.

21013440033241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21013440033241 is an equidigital number, since it uses as much as digits as its factorization.

21013440033241 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 21013440033241 its reverse (14233004431012), we get a palindrome (35246444464253).

The spelling of 21013440033241 in words is "twenty-one trillion, thirteen billion, four hundred forty million, thirty-three thousand, two hundred forty-one".