111000010110991 has 2 divisors, whose sum is σ = 111000010110992. Its totient is φ = 111000010110990.

The previous prime is 111000010110971. The next prime is 111000010111031. The reversal of 111000010110991 is 199011010000111.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 111000010110991 - 2¹³ = 111000010102799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111000010110911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55500005055495 + 55500005055496.

It is an arithmetic number, because the mean of its divisors is an integer number (55500005055496).

Almost surely, 2^{111000010110991} is an apocalyptic number.

111000010110991 is a deficient number, since it is larger than the sum of its proper divisors (1).

111000010110991 is an equidigital number, since it uses as much as digits as its factorization.

111000010110991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 111000010110991 in words is "one hundred eleven trillion, ten million, one hundred ten thousand, nine hundred ninety-one".