1019200191091 has 2 divisors, whose sum is σ = 1019200191092. Its totient is φ = 1019200191090.

The previous prime is 1019200191011. The next prime is 1019200191143. The reversal of 1019200191091 is 1901910029101.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1019200191091 - 2¹⁵ = 1019200158323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1019200191001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 509600095545 + 509600095546.

It is an arithmetic number, because the mean of its divisors is an integer number (509600095546).

Almost surely, 2^{1019200191091} is an apocalyptic number.

1019200191091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019200191091 is an equidigital number, since it uses as much as digits as its factorization.

1019200191091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 34.

The spelling of 1019200191091 in words is "one trillion, nineteen billion, two hundred million, one hundred ninety-one thousand, ninety-one".