21000110041 has 2 divisors, whose sum is σ = 21000110042. Its totient is φ = 21000110040.

The previous prime is 21000110029. The next prime is 21000110057. The reversal of 21000110041 is 14001100012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20654001225 + 346108816 = 143715^2 + 18604^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000110041 - 2⁷ = 21000109913 is a prime.

It is not a weakly prime, because it can be changed into another prime (21000110441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500055020 + 10500055021.

It is an arithmetic number, because the mean of its divisors is an integer number (10500055021).

Almost surely, 2^21000110041 is an apocalyptic number.

It is an amenable number.

21000110041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000110041 is an equidigital number, since it uses as much as digits as its factorization.

21000110041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21000110041 its reverse (14001100012), we get a palindrome (35001210053).

The spelling of 21000110041 in words is "twenty-one billion, one hundred ten thousand, forty-one".