221111111112193 has 2 divisors, whose sum is σ = 221111111112194. Its totient is φ = 221111111112192.

The previous prime is 221111111112191. The next prime is 221111111112211. The reversal of 221111111112193 is 391211111111122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 151431556897009 + 69679554215184 = 12305753^2 + 8347428^2 .

It is a cyclic number.

It is not a de Polignac number, because 221111111112193 - 2¹ = 221111111112191 is a prime.

Together with 221111111112191, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221111111112191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555555556096 + 110555555556097.

It is an arithmetic number, because the mean of its divisors is an integer number (110555555556097).

Almost surely, 2^{221111111112193} is an apocalyptic number.

It is an amenable number.

221111111112193 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111111112193 is an equidigital number, since it uses as much as digits as its factorization.

221111111112193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 216, while the sum is 28.

The spelling of 221111111112193 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, one hundred twelve thousand, one hundred ninety-three".