21102303169 has 2 divisors, whose sum is σ = 21102303170. Its totient is φ = 21102303168.

The previous prime is 21102303113. The next prime is 21102303221. The reversal of 21102303169 is 96130320112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19309881600 + 1792421569 = 138960^2 + 42337^2 .

It is a cyclic number.

It is not a de Polignac number, because 21102303169 - 2¹⁵ = 21102270401 is a prime.

It is a super-2 number, since 2×21102303169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21102303569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10551151584 + 10551151585.

It is an arithmetic number, because the mean of its divisors is an integer number (10551151585).

Almost surely, 2^21102303169 is an apocalyptic number.

It is an amenable number.

21102303169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102303169 is an equidigital number, since it uses as much as digits as its factorization.

21102303169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The spelling of 21102303169 in words is "twenty-one billion, one hundred two million, three hundred three thousand, one hundred sixty-nine".