11122221222191 has 2 divisors, whose sum is σ = 11122221222192. Its totient is φ = 11122221222190.

The previous prime is 11122221222163. The next prime is 11122221222241. The reversal of 11122221222191 is 19122212222111.

It is a weak prime.

It is an emirp because it is prime and its reverse (19122212222111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11122221222191 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11122221222131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5561110611095 + 5561110611096.

It is an arithmetic number, because the mean of its divisors is an integer number (5561110611096).

Almost surely, 2^{11122221222191} is an apocalyptic number.

11122221222191 is a deficient number, since it is larger than the sum of its proper divisors (1).

11122221222191 is an equidigital number, since it uses as much as digits as its factorization.

11122221222191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 29.

The spelling of 11122221222191 in words is "eleven trillion, one hundred twenty-two billion, two hundred twenty-one million, two hundred twenty-two thousand, one hundred ninety-one".