2102321191 has 2 divisors, whose sum is σ = 2102321192. Its totient is φ = 2102321190.

The previous prime is 2102321189. The next prime is 2102321227. The reversal of 2102321191 is 1911232012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2102321191 - 2¹ = 2102321189 is a prime.

Together with 2102321189, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102321491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051160595 + 1051160596.

It is an arithmetic number, because the mean of its divisors is an integer number (1051160596).

Almost surely, 2^2102321191 is an apocalyptic number.

2102321191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102321191 is an equidigital number, since it uses as much as digits as its factorization.

2102321191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 2102321191 is about 45851.0762251008. The cubic root of 2102321191 is about 1281.0508117048.

The spelling of 2102321191 in words is "two billion, one hundred two million, three hundred twenty-one thousand, one hundred ninety-one".