220111010202191 has 2 divisors, whose sum is σ = 220111010202192. Its totient is φ = 220111010202190.

The previous prime is 220111010202157. The next prime is 220111010202221. The reversal of 220111010202191 is 191202010111022.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220111010202191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220111010202091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110055505101095 + 110055505101096.

It is an arithmetic number, because the mean of its divisors is an integer number (110055505101096).

Almost surely, 2^{220111010202191} is an apocalyptic number.

220111010202191 is a deficient number, since it is larger than the sum of its proper divisors (1).

220111010202191 is an equidigital number, since it uses as much as digits as its factorization.

220111010202191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 23.

The spelling of 220111010202191 in words is "two hundred twenty trillion, one hundred eleven billion, ten million, two hundred two thousand, one hundred ninety-one".