21112001030017 has 2 divisors, whose sum is σ = 21112001030018. Its totient is φ = 21112001030016.

The previous prime is 21112001030011. The next prime is 21112001030033. The reversal of 21112001030017 is 71003010021112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16495652282256 + 4616348747761 = 4061484^2 + 2148569^2 .

It is a cyclic number.

It is not a de Polignac number, because 21112001030017 - 2²³ = 21111992641409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21112001029976 and 21112001030003.

It is not a weakly prime, because it can be changed into another prime (21112001030011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556000515008 + 10556000515009.

It is an arithmetic number, because the mean of its divisors is an integer number (10556000515009).

Almost surely, 2^{21112001030017} is an apocalyptic number.

It is an amenable number.

21112001030017 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112001030017 is an equidigital number, since it uses as much as digits as its factorization.

21112001030017 is an evil number, because the sum of its binary digits is even.

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

Adding to 21112001030017 its reverse (71003010021112), we get a palindrome (92115011051129).

The spelling of 21112001030017 in words is "twenty-one trillion, one hundred twelve billion, one million, thirty thousand, seventeen".