1091187070811 has 2 divisors, whose sum is σ = 1091187070812. Its totient is φ = 1091187070810.

The previous prime is 1091187070781. The next prime is 1091187070843. The reversal of 1091187070811 is 1180707811901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1091187070811 - 2¹⁴ = 1091187054427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1091187070891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 545593535405 + 545593535406.

It is an arithmetic number, because the mean of its divisors is an integer number (545593535406).

Almost surely, 2^{1091187070811} is an apocalyptic number.

1091187070811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1091187070811 is an equidigital number, since it uses as much as digits as its factorization.

1091187070811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 44.

The spelling of 1091187070811 in words is "one trillion, ninety-one billion, one hundred eighty-seven million, seventy thousand, eight hundred eleven".