11112010991 has 2 divisors, whose sum is σ = 11112010992. Its totient is φ = 11112010990.

The previous prime is 11112010967. The next prime is 11112011041. The reversal of 11112010991 is 19901021111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11112010991 - 2⁶ = 11112010927 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11112010991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112010961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556005495 + 5556005496.

It is an arithmetic number, because the mean of its divisors is an integer number (5556005496).

Almost surely, 2^11112010991 is an apocalyptic number.

11112010991 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112010991 is an equidigital number, since it uses as much as digits as its factorization.

11112010991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 26.

It can be divided in two parts, 1111 and 2010991, that added together give a palindrome (2012102).

The spelling of 11112010991 in words is "eleven billion, one hundred twelve million, ten thousand, nine hundred ninety-one".