21211003300169 has 2 divisors, whose sum is σ = 21211003300170. Its totient is φ = 21211003300168.

The previous prime is 21211003300133. The next prime is 21211003300171. The reversal of 21211003300169 is 96100330011212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19702989828025 + 1508013472144 = 4438805^2 + 1228012^2 .

It is a cyclic number.

It is not a de Polignac number, because 21211003300169 - 2¹² = 21211003296073 is a prime.

It is a super-2 number, since 2×21211003300169² (a number of 27 digits) contains 22 as substring.

Together with 21211003300171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (21211003350169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10605501650084 + 10605501650085.

It is an arithmetic number, because the mean of its divisors is an integer number (10605501650085).

Almost surely, 2^{21211003300169} is an apocalyptic number.

It is an amenable number.

21211003300169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21211003300169 is an equidigital number, since it uses as much as digits as its factorization.

21211003300169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 21211003300169 in words is "twenty-one trillion, two hundred eleven billion, three million, three hundred thousand, one hundred sixty-nine".