21100101010169 has 2 divisors, whose sum is σ = 21100101010170. Its totient is φ = 21100101010168.

The previous prime is 21100101010081. The next prime is 21100101010211. The reversal of 21100101010169 is 96101010100112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17439143040400 + 3660957969769 = 4176020^2 + 1913363^2 .

It is a cyclic number.

It is not a de Polignac number, because 21100101010169 - 2⁴⁰ = 20000589382393 is a prime.

It is a super-2 number, since 2×21100101010169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21100101040169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550050505084 + 10550050505085.

It is an arithmetic number, because the mean of its divisors is an integer number (10550050505085).

Almost surely, 2^{21100101010169} is an apocalyptic number.

It is an amenable number.

21100101010169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21100101010169 is an equidigital number, since it uses as much as digits as its factorization.

21100101010169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 23.

The spelling of 21100101010169 in words is "twenty-one trillion, one hundred billion, one hundred one million, ten thousand, one hundred sixty-nine".