21210011041 has 2 divisors, whose sum is σ = 21210011042. Its totient is φ = 21210011040.

The previous prime is 21210011033. The next prime is 21210011051. The reversal of 21210011041 is 14011001212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14985432225 + 6224578816 = 122415^2 + 78896^2 .

It is a cyclic number.

It is not a de Polignac number, because 21210011041 - 2³ = 21210011033 is a prime.

It is not a weakly prime, because it can be changed into another prime (21210011051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605005520 + 10605005521.

It is an arithmetic number, because the mean of its divisors is an integer number (10605005521).

Almost surely, 2^21210011041 is an apocalyptic number.

It is an amenable number.

21210011041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21210011041 is an equidigital number, since it uses as much as digits as its factorization.

21210011041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21210011041 its reverse (14011001212), we get a palindrome (35221012253).

The spelling of 21210011041 in words is "twenty-one billion, two hundred ten million, eleven thousand, forty-one".