21021130001017 has 2 divisors, whose sum is σ = 21021130001018. Its totient is φ = 21021130001016.

The previous prime is 21021130000973. The next prime is 21021130001023. The reversal of 21021130001017 is 71010003112012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15755096394361 + 5266033606656 = 3969269^2 + 2294784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21021130001017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21021130000985 and 21021130001003.

It is not a weakly prime, because it can be changed into another prime (21021130031017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10510565000508 + 10510565000509.

It is an arithmetic number, because the mean of its divisors is an integer number (10510565000509).

Almost surely, 2^{21021130001017} is an apocalyptic number.

It is an amenable number.

21021130001017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21021130001017 is an equidigital number, since it uses as much as digits as its factorization.

21021130001017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84, while the sum is 19.

Adding to 21021130001017 its reverse (71010003112012), we get a palindrome (92031133113029).

The spelling of 21021130001017 in words is "twenty-one trillion, twenty-one billion, one hundred thirty million, one thousand, seventeen".