2102211191 has 2 divisors, whose sum is σ = 2102211192. Its totient is φ = 2102211190.

The previous prime is 2102211187. The next prime is 2102211193. The reversal of 2102211191 is 1911122012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2102211191 - 2² = 2102211187 is a prime.

Together with 2102211193, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2102211193) 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, 1051105595 + 1051105596.

It is an arithmetic number, because the mean of its divisors is an integer number (1051105596).

Almost surely, 2^2102211191 is an apocalyptic number.

2102211191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102211191 is an equidigital number, since it uses as much as digits as its factorization.

2102211191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

The square root of 2102211191 is about 45849.8766737709. The cubic root of 2102211191 is about 1281.0284684575.

The spelling of 2102211191 in words is "two billion, one hundred two million, two hundred eleven thousand, one hundred ninety-one".