2221111100191 has 2 divisors, whose sum is σ = 2221111100192. Its totient is φ = 2221111100190.

The previous prime is 2221111100189. The next prime is 2221111100207. The reversal of 2221111100191 is 1910011111222.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2221111100191 - 2¹ = 2221111100189 is a prime.

Together with 2221111100189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221111100141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110555550095 + 1110555550096.

It is an arithmetic number, because the mean of its divisors is an integer number (1110555550096).

Almost surely, 2^{2221111100191} is an apocalyptic number.

2221111100191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221111100191 is an equidigital number, since it uses as much as digits as its factorization.

2221111100191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 2221111100191 in words is "two trillion, two hundred twenty-one billion, one hundred eleven million, one hundred thousand, one hundred ninety-one".