110111111993 has 2 divisors, whose sum is σ = 110111111994. Its totient is φ = 110111111992.

The previous prime is 110111111989. The next prime is 110111112049. The reversal of 110111111993 is 399111111011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97751898409 + 12359213584 = 312653^2 + 111172^2 .

It is a cyclic number.

It is not a de Polignac number, because 110111111993 - 2² = 110111111989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (110111111923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55055555996 + 55055555997.

It is an arithmetic number, because the mean of its divisors is an integer number (55055555997).

Almost surely, 2^110111111993 is an apocalyptic number.

It is an amenable number.

110111111993 is a deficient number, since it is larger than the sum of its proper divisors (1).

110111111993 is an equidigital number, since it uses as much as digits as its factorization.

110111111993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 29.

The spelling of 110111111993 in words is "one hundred ten billion, one hundred eleven million, one hundred eleven thousand, nine hundred ninety-three".