2102220191 has 2 divisors, whose sum is σ = 2102220192. Its totient is φ = 2102220190.

The previous prime is 2102220151. The next prime is 2102220193. The reversal of 2102220191 is 1910222012.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2102220191 is a prime.

Together with 2102220193, 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 (2102220193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1051110095 + 1051110096.

It is an arithmetic number, because the mean of its divisors is an integer number (1051110096).

Almost surely, 2^2102220191 is an apocalyptic number.

2102220191 is a deficient number, since it is larger than the sum of its proper divisors (1).

2102220191 is an equidigital number, since it uses as much as digits as its factorization.

2102220191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2102220191 is about 45849.9748200585. The cubic root of 2102220191 is about 1281.0302965706.

The spelling of 2102220191 in words is "two billion, one hundred two million, two hundred twenty thousand, one hundred ninety-one".