11101112009891 has 2 divisors, whose sum is σ = 11101112009892. Its totient is φ = 11101112009890.

The previous prime is 11101112009873. The next prime is 11101112009903. The reversal of 11101112009891 is 19890021110111.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101112009891 is a prime.

It is a super-2 number, since 2×11101112009891² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11101112009791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550556004945 + 5550556004946.

It is an arithmetic number, because the mean of its divisors is an integer number (5550556004946).

Almost surely, 2^{11101112009891} is an apocalyptic number.

11101112009891 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101112009891 is an equidigital number, since it uses as much as digits as its factorization.

11101112009891 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 35.

The spelling of 11101112009891 in words is "eleven trillion, one hundred one billion, one hundred twelve million, nine thousand, eight hundred ninety-one".