221102152169 has 2 divisors, whose sum is σ = 221102152170. Its totient is φ = 221102152168.

The previous prime is 221102152157. The next prime is 221102152171. The reversal of 221102152169 is 961251201122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194128360000 + 26973792169 = 440600^2 + 164237^2 .

It is a cyclic number.

It is not a de Polignac number, because 221102152169 - 2⁴ = 221102152153 is a prime.

It is a super-2 number, since 2×221102152169² (a number of 23 digits) contains 22 as substring.

Together with 221102152171, 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 (221102152189) 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, 110551076084 + 110551076085.

It is an arithmetic number, because the mean of its divisors is an integer number (110551076085).

Almost surely, 2^221102152169 is an apocalyptic number.

It is an amenable number.

221102152169 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102152169 is an equidigital number, since it uses as much as digits as its factorization.

221102152169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 32.

The spelling of 221102152169 in words is "two hundred twenty-one billion, one hundred two million, one hundred fifty-two thousand, one hundred sixty-nine".