1018191920191 has 2 divisors, whose sum is σ = 1018191920192. Its totient is φ = 1018191920190.

The previous prime is 1018191920173. The next prime is 1018191920197. The reversal of 1018191920191 is 1910291918101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1018191920191 - 2¹⁵ = 1018191887423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1018191920197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509095960095 + 509095960096.

It is an arithmetic number, because the mean of its divisors is an integer number (509095960096).

Almost surely, 2^{1018191920191} is an apocalyptic number.

1018191920191 is a deficient number, since it is larger than the sum of its proper divisors (1).

1018191920191 is an equidigital number, since it uses as much as digits as its factorization.

1018191920191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 43.

The spelling of 1018191920191 in words is "one trillion, eighteen billion, one hundred ninety-one million, nine hundred twenty thousand, one hundred ninety-one".