2128215071 has 2 divisors, whose sum is σ = 2128215072. Its totient is φ = 2128215070.

The previous prime is 2128215043. The next prime is 2128215079. The reversal of 2128215071 is 1705128212.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2128215071 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2128215079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1064107535 + 1064107536.

It is an arithmetic number, because the mean of its divisors is an integer number (1064107536).

Almost surely, 2^2128215071 is an apocalyptic number.

2128215071 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128215071 is an equidigital number, since it uses as much as digits as its factorization.

2128215071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 29.

The square root of 2128215071 is about 46132.5814473892. The cubic root of 2128215071 is about 1286.2888492269.

The spelling of 2128215071 in words is "two billion, one hundred twenty-eight million, two hundred fifteen thousand, seventy-one".