11101010009891 has 2 divisors, whose sum is σ = 11101010009892. Its totient is φ = 11101010009890.

The previous prime is 11101010009863. The next prime is 11101010009909. The reversal of 11101010009891 is 19890001010111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11101010009891 - 2³⁰ = 11099936268067 is a prime.

It is not a weakly prime, because it can be changed into another prime (11101010009801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550505004945 + 5550505004946.

It is an arithmetic number, because the mean of its divisors is an integer number (5550505004946).

Almost surely, 2^{11101010009891} is an apocalyptic number.

11101010009891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101010009891 is an equidigital number, since it uses as much as digits as its factorization.

11101010009891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 32.

The spelling of 11101010009891 in words is "eleven trillion, one hundred one billion, ten million, nine thousand, eight hundred ninety-one".