221102111202197 has 2 divisors, whose sum is σ = 221102111202198. Its totient is φ = 221102111202196.

The previous prime is 221102111202191. The next prime is 221102111202233. The reversal of 221102111202197 is 791202111201122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111257751398641 + 109844359803556 = 10547879^2 + 10480666^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221102111202197 is a prime.

It is a super-2 number, since 2×221102111202197² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221102111202191) 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, 110551055601098 + 110551055601099.

It is an arithmetic number, because the mean of its divisors is an integer number (110551055601099).

Almost surely, 2^{221102111202197} is an apocalyptic number.

It is an amenable number.

221102111202197 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102111202197 is an equidigital number, since it uses as much as digits as its factorization.

221102111202197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 32.

The spelling of 221102111202197 in words is "two hundred twenty-one trillion, one hundred two billion, one hundred eleven million, two hundred two thousand, one hundred ninety-seven".