21010001041 has 2 divisors, whose sum is σ = 21010001042. Its totient is φ = 21010001040.

The previous prime is 21010001029. The next prime is 21010001063. The reversal of 21010001041 is 14010001012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18441640000 + 2568361041 = 135800^2 + 50679^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21010001041 is a prime.

It is not a weakly prime, because it can be changed into another prime (21010001011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505000520 + 10505000521.

It is an arithmetic number, because the mean of its divisors is an integer number (10505000521).

Almost surely, 2^21010001041 is an apocalyptic number.

It is an amenable number.

21010001041 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010001041 is an equidigital number, since it uses as much as digits as its factorization.

21010001041 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 21010001041 its reverse (14010001012), we get a palindrome (35020002053).

The spelling of 21010001041 in words is "twenty-one billion, ten million, one thousand, forty-one".