191220110143 has 2 divisors, whose sum is σ = 191220110144. Its totient is φ = 191220110142.

The previous prime is 191220110101. The next prime is 191220110161. The reversal of 191220110143 is 341011022191.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-191220110143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (191220110443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95610055071 + 95610055072.

It is an arithmetic number, because the mean of its divisors is an integer number (95610055072).

Almost surely, 2^191220110143 is an apocalyptic number.

191220110143 is a deficient number, since it is larger than the sum of its proper divisors (1).

191220110143 is an equidigital number, since it uses as much as digits as its factorization.

191220110143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 25.

The spelling of 191220110143 in words is "one hundred ninety-one billion, two hundred twenty million, one hundred ten thousand, one hundred forty-three".