21110201017 has 2 divisors, whose sum is σ = 21110201018. Its totient is φ = 21110201016.

The previous prime is 21110200967. The next prime is 21110201029. The reversal of 21110201017 is 71010201112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10622188096 + 10488012921 = 103064^2 + 102411^2 .

It is a cyclic number.

It is not a de Polignac number, because 21110201017 - 2¹¹ = 21110198969 is a prime.

It is a super-5 number, since 5×21110201017⁵ (a number of 53 digits) contains 55555 as substring.

It is not a weakly prime, because it can be changed into another prime (21110801017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555100508 + 10555100509.

It is an arithmetic number, because the mean of its divisors is an integer number (10555100509).

Almost surely, 2^21110201017 is an apocalyptic number.

It is an amenable number.

21110201017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110201017 is an equidigital number, since it uses as much as digits as its factorization.

21110201017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28, while the sum is 16.

Adding to 21110201017 its reverse (71010201112), we get a palindrome (92120402129).

The spelling of 21110201017 in words is "twenty-one billion, one hundred ten million, two hundred one thousand, seventeen".