21202010001169 has 2 divisors, whose sum is σ = 21202010001170. Its totient is φ = 21202010001168.

The previous prime is 21202010001157. The next prime is 21202010001223. The reversal of 21202010001169 is 96110001020212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20038944814144 + 1163065187025 = 4476488^2 + 1078455^2 .

It is a cyclic number.

It is not a de Polignac number, because 21202010001169 - 2¹⁹ = 21202009476881 is a prime.

It is a super-2 number, since 2×21202010001169² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21202010001119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601005000584 + 10601005000585.

It is an arithmetic number, because the mean of its divisors is an integer number (10601005000585).

Almost surely, 2^{21202010001169} is an apocalyptic number.

It is an amenable number.

21202010001169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202010001169 is an equidigital number, since it uses as much as digits as its factorization.

21202010001169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 21202010001169 in words is "twenty-one trillion, two hundred two billion, ten million, one thousand, one hundred sixty-nine".