2111101997 has 2 divisors, whose sum is σ = 2111101998. Its totient is φ = 2111101996.

The previous prime is 2111101991. The next prime is 2111102011. The reversal of 2111101997 is 7991011112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2111034916 + 67081 = 45946^2 + 259^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111101997 - 2⁴ = 2111101981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111101991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055550998 + 1055550999.

It is an arithmetic number, because the mean of its divisors is an integer number (1055550999).

Almost surely, 2^2111101997 is an apocalyptic number.

It is an amenable number.

2111101997 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111101997 is an equidigital number, since it uses as much as digits as its factorization.

2111101997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1134, while the sum is 32.

The square root of 2111101997 is about 45946.7299924597. The cubic root of 2111101997 is about 1282.8318643352.

The spelling of 2111101997 in words is "two billion, one hundred eleven million, one hundred one thousand, nine hundred ninety-seven".