21183020041 has 2 divisors, whose sum is σ = 21183020042. Its totient is φ = 21183020040.

The previous prime is 21183019999. The next prime is 21183020077. The reversal of 21183020041 is 14002038112.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18779961600 + 2403058441 = 137040^2 + 49021^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21183020041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21183019994 and 21183020021.

It is not a weakly prime, because it can be changed into another prime (21183020081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10591510020 + 10591510021.

It is an arithmetic number, because the mean of its divisors is an integer number (10591510021).

Almost surely, 2^21183020041 is an apocalyptic number.

It is an amenable number.

21183020041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21183020041 is an equidigital number, since it uses as much as digits as its factorization.

21183020041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 21183020041 its reverse (14002038112), we get a palindrome (35185058153).

The spelling of 21183020041 in words is "twenty-one billion, one hundred eighty-three million, twenty thousand, forty-one".