21010025041 has 2 divisors, whose sum is σ = 21010025042. Its totient is φ = 21010025040.

The previous prime is 21010024943. The next prime is 21010025077. The reversal of 21010025041 is 14052001012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14913538641 + 6096486400 = 122121^2 + 78080^2 .

It is a cyclic number.

It is not a de Polignac number, because 21010025041 - 2¹⁹ = 21009500753 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010025081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505012520 + 10505012521.

It is an arithmetic number, because the mean of its divisors is an integer number (10505012521).

Almost surely, 2^21010025041 is an apocalyptic number.

It is an amenable number.

21010025041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010025041 is an equidigital number, since it uses as much as digits as its factorization.

21010025041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 21010025041 its reverse (14052001012), we get a palindrome (35062026053).

The spelling of 21010025041 in words is "twenty-one billion, ten million, twenty-five thousand, forty-one".