21163634130169 has 2 divisors, whose sum is σ = 21163634130170. Its totient is φ = 21163634130168.

The previous prime is 21163634130139. The next prime is 21163634130187. The reversal of 21163634130169 is 96103143636112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20621589210000 + 542044920169 = 4541100^2 + 736237^2 .

It is a cyclic number.

It is not a de Polignac number, because 21163634130169 - 2²⁵ = 21163600575737 is a prime.

It is a super-2 number, since 2×21163634130169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21163634130109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581817065084 + 10581817065085.

It is an arithmetic number, because the mean of its divisors is an integer number (10581817065085).

Almost surely, 2^{21163634130169} is an apocalyptic number.

It is an amenable number.

21163634130169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21163634130169 is an equidigital number, since it uses as much as digits as its factorization.

21163634130169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 46.

The spelling of 21163634130169 in words is "twenty-one trillion, one hundred sixty-three billion, six hundred thirty-four million, one hundred thirty thousand, one hundred sixty-nine".