21202201169 has 2 divisors, whose sum is σ = 21202201170. Its totient is φ = 21202201168.

The previous prime is 21202201093. The next prime is 21202201177. The reversal of 21202201169 is 96110220212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10636828225 + 10565372944 = 103135^2 + 102788^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202201169 is a prime.

It is a super-2 number, since 2×21202201169² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21202201369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10601100584 + 10601100585.

It is an arithmetic number, because the mean of its divisors is an integer number (10601100585).

Almost surely, 2^21202201169 is an apocalyptic number.

It is an amenable number.

21202201169 is a deficient number, since it is larger than the sum of its proper divisors (1).

21202201169 is an equidigital number, since it uses as much as digits as its factorization.

21202201169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 26.

The spelling of 21202201169 in words is "twenty-one billion, two hundred two million, two hundred one thousand, one hundred sixty-nine".